Easily tearable adhesive tape

Abstract

This invention discloses an easy-tear adhesive strip, relating to the technical field of easy-tear adhesive tapes and easy-tear sealing labels. It includes at least a support layer; one or both sides of the support layer are compositely connected to a functional layer, and after the surface of the functional layer is compositely connected to an adhesive layer, it is wound onto a core to form an adhesive strip or tape, or pasted onto the surface of release paper; one or both sides of the support layer are cut to the functional layer to form two parallel tangent lines, and an easy-tear line is formed on the functional layer between the two tangent lines; or tangent lines are cut along one edge and / or surface of the adhesive strip or tape, or two relatively distributed tangent lines are cut along the middle of the adhesive strip or tape, and the cut between the tangent lines forms a first easy-tear opening. By tearing the easy-tear line, a first easy-tear opening is formed on the adhesive strip or tape, and a second easy-tear opening is formed during use, allowing for easy opening without tools, thus solving the problem of traditional adhesive strips and tapes being difficult to open.

Description

Technical Field

[0001] This invention relates to the field of adhesive tape products, and more particularly to an easy-tear adhesive strip. Background Technology

[0002] Existing adhesive tapes offer high strength and strong adhesion, effectively ensuring a sealed connection for the box. However, they require tools to open, which is relatively inconvenient. Meanwhile, existing easy-tear tapes have relatively lower sealing strength. Using easy-tear adhesive strips and tapes, while maintaining strength, also provides convenient box opening, improving the user experience.

[0003] Existing sealing labels ensure connection strength and one-time opening, but the labels at the opening are difficult to tear. Using easy-tear adhesive strips allows for easy tearing of the sealing labels within a designated area. Summary of the Invention

[0004] The purpose of this invention is to provide an easy-tear adhesive strip. Two parallel serrated lines are cut into the functional layer on one or both sides of the support layer. An easy-tear line is formed on the functional layer between the two serrated lines. The easy-tear line is longitudinally torn through a second easy-tear opening, creating a first easy-tear opening on the adhesive strip. The adhesive strip is then torn laterally through this first easy-tear opening. This allows for easy opening without tools, overcoming the difficulty of opening traditional adhesive strips. The support layer ensures the strength of the adhesive strip, while the functional layer enables easy tearing. The adhesive strip is cut to form an adhesive strip (sealing label). The sealing label provides easy tearing in a designated area or direction, while maintaining a secure connection in other areas.

[0005] The technical solution of this invention is implemented as follows: An easy-tear adhesive strip, comprising at least a support layer; One or both sides of the support layer are composite connected with a functional layer. After the surface of the functional layer is composite connected with an adhesive layer, it is wound onto the core to form an adhesive tape or the adhesive tape is cut and pasted onto the surface of the release paper to form an adhesive strip. Two parallel tangent lines are cut into the functional layer on one or both sides of the support layer of the adhesive tape, and an easy-tear line is formed on the functional layer between the two tangent lines. The tangent line may be cut along one edge and / or surface of the adhesive strip, or two oppositely distributed tangent lines may be cut along the middle of the adhesive strip, with the cut between the tangent lines forming a first easy-tear opening.

[0006] Furthermore, the tangent is one of the following: a zigzag tangent, a straight tangent, a curved tangent, or an arc-shaped tangent.

[0007] Furthermore, the serrated tangent is a continuous or intermittent arrangement of triangular cuts or semi-circular arc cuts with included angles; the straight tangent is a straight cut; and the curved tangent and the arc-shaped tangent are arc-shaped cuts.

[0008] Furthermore, the angle between the first tear-off opening and the triangular cut and semi-circular cut located on the functional layer is between 10 and 150°.

[0009] Furthermore, when the tangent is cut along one edge and / or surface of the adhesive strip, the tangent is one or more parallel lines.

[0010] Furthermore, when two parallel tangent lines are cut on the functional layers on both sides of the support layer, the tangent lines are aligned and overlap each other.

[0011] Furthermore, by tearing the easy-tear line, the support layer is torn along the tangent trajectory in the functional layer, so that the cuts of the functional layer and the support layer are aligned and overlapped, forming the first easy-tear opening on the adhesive tape; when the adhesive tape is cut, a second easy-tear opening is formed on both sides of the end of the easy-tear line.

[0012] Furthermore, the tangents on the functional layer are indented, partially cut, or fully cut.

[0013] Furthermore, when the edge of the adhesive strip is cut with the tangent, the functional layer is provided with the straight tangent and / or creases that are perpendicular to the tangent.

[0014] Furthermore, when the tangent line is cut on one side edge of the adhesive strip, the adhesive strip or adhesive tape is provided with dotted lines and / or creases that are perpendicular to the tangent line.

[0015] Furthermore, the adhesive strip has inwardly inclined oblique cuts on both sides.

[0016] Furthermore, the adhesive strip has at least one through hole, and two oppositely distributed tangent lines are cut on opposite sides of the edge of the through hole.

[0017] An easy-tear adhesive strip includes a support layer or a functional layer, wherein an adhesive layer is laminated and bonded to the surface of the support layer or the functional layer to form an adhesive strip; a tangent line is cut along one edge and / or the surface of the adhesive strip or two oppositely distributed tangent lines are cut along the middle of the adhesive strip, and the cut between the tangent lines forms a first easy-tear opening.

[0018] The beneficial effects of this invention are: the support layer ensures the strength of the adhesive strips and tapes (meeting the requirements for sealing and protection), the functional layer achieves easy-tear functionality, and after lamination, without affecting the reliability of the connection, two parallel serrated tangent lines are formed on one or both sides of the support layer to the functional layer, and an easy-tear line is formed on the functional layer between the two serrated tangent lines; by tearing the easy-tear line longitudinally through the second easy-tear opening, a first easy-tear opening is formed on the adhesive tape, and the adhesive tape is torn laterally through the first easy-tear opening. The box can be opened by hand without tools, solving the defect of traditional adhesive tapes being difficult to open. Furthermore, the adhesive strips and tapes can be torn open from a specified direction or area through the first easy-tear opening of the serrated tangent line, achieving the purpose of easy tearing while ensuring the connection strength of the adhesive strips and tapes. Attached Figure Description

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

[0020] Figure 1 A three-dimensional structural diagram of the easy-tear strip when adhesive tape is used to seal the box. Figure 2 A three-dimensional exploded view of the adhesive tape with functional layers bonded to both sides of the support layer; Figure 3 A three-dimensional structural diagram of an adhesive tape with a functional layer hot-melt bonded to one side of the support layer; Figure 4 A top view of the structure in which two serrated tangents are cut into the functional layer of the adhesive tape to form an easy-tear line; Figure 5 A top view diagram of two parallel adhesive strips arranged to cut a perforated adhesive strip; Figure 6 A top view diagram showing the second tear-off opening formed on both sides of the tear-off strip at both ends of the adhesive tape when the serrated tangent is used. Figure 7 A schematic diagram of the side structure of the adhesive tape with functional layers bonded to both sides of the support layer; Figure 8 A schematic diagram of the side structure of the adhesive tape with the functional layer hot-melt bonded to one side of the support layer; Figure 9 A schematic diagram of a three-dimensional structure in which two straight tangents are cut on the functional layer of the adhesive tape to form an easy-tear strip connecting the box body; Figure 10A three-dimensional structural diagram showing two straight tangents cut into the functional layer of the adhesive tape to form an easy-tear line, which is pulled through the second easy-tear opening when connecting to the box body; Figure 11 A top view diagram showing the second tear-off opening formed on both sides of the tear strip ends of the adhesive tape in the case of a straight tangent. Figure 12 A top view diagram showing the structure of an adhesive tape made of an easy-tear material, in which two straight tangents are cut on the functional layer to form an easy-tear tear line; Figure 13 A side view diagram showing how to seal an open bag after cutting a serrated tangent along one side of the adhesive strip. Figure 14 A three-dimensional exploded structural diagram of an adhesive strip composed of a support layer, a functional layer, and an adhesive layer, with a serrated tangent cut along one edge of the strip. Figure 15 A three-dimensional exploded structural diagram of an adhesive strip consisting of a support layer and an adhesive layer, with a serrated tangent cut along one edge of the strip. Figure 16 A top view of the structure showing a serrated tangent cut along one edge of the adhesive strip; Figure 17 A top view of the structure showing parallel serrated tangents cut along one side of the adhesive strip's edge and on its surface; Figure 18 A schematic diagram of a three-dimensional exploded structure showing a serrated tangent cut along one edge of the adhesive strip and a straight tangent cut in the middle of the functional layer, which are perpendicular to each other. Figure 19 A schematic diagram of a structure in which a serrated tangent is cut along one edge of the adhesive strip and the point break line cut in the middle of the functional layer is perpendicular to each other; Figure 20 A top view of the structure where multiple straight tangents are cut along one edge of the adhesive strip; Figure 21 A three-dimensional structural diagram showing two parallel adhesive strips arranged to seal the opening of a box, designed for cutting a perforated, easy-tear adhesive strip. Figure 22 This is a top view diagram of the adhesive strip after it has been cut and pasted onto the surface of the release paper. Figure 23 A three-dimensional structural diagram showing how an adhesive strip with through holes at both ends seals the opening when the lid and box are separated. Figure 24 A top view schematic diagram of an adhesive strip with through holes at both ends; Figure 25 A top view of an adhesive strip with a through hole at one end; Figure 26A three-dimensional structural diagram showing how multiple parallel straight tangent lines are used to seal the box opening on the surface of the adhesive strip; Figure 27 A top view schematic diagram of the adhesive strip with serrated tangents arranged symmetrically in parallel within the through hole; Figure 28 A top view schematic diagram of the adhesive strip with serrated tangents arranged obliquely and symmetrically in the through hole; Figure 29 A top view schematic diagram of the serrated tangents on the adhesive strip arranged in an arc-shaped symmetrical pattern in the through hole; Figure 30 A top view of the adhesive strip with serrated tangents arranged in a ring in the through hole; Figure 31 A top view schematic diagram of the asymmetrical arrangement of serrated tangents on the adhesive strip within the through hole; Figure 32 A top view of the adhesive strip with multiple parallel straight tangents; Figure 33 A top view of the adhesive strip with two rows of straight tangents; Figure 34 A top view diagram of an adhesive strip with multiple parallel curved tangents; Figure 35 A schematic diagram showing a structure with multiple parallel arc-shaped tangents on an adhesive strip; Figure 36 A side view diagram showing a printed layer on an easy-tear sealing label; Figure 37 A top view of the structure of the adhesive strip with inwardly sloping cuts on both sides.

[0021] Explanation of icon numbers 1. Support layer; 2. Functional layer; 3. Adhesive layer; 4. Easy-tear line; 5. Cut line; 6. First easy-tear opening; 7. Second easy-tear opening; 8. Angled cut; 9. Through hole; 10. Printing layer; 11. Release paper; 5a. Serrated cut line; 5b. Straight cut line; 5c. Curved cut line; 5d. Arc cut line; 5e. Dotted break line. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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 the invention 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 invention.

[0024] Example 1 See attached document Figures 1-2 , Figures 4-7 As shown, the easy-tear adhesive tape according to an embodiment of the present invention includes at least a support layer 1. Functional layers 2 are provided on both sides of the support layer 1. After an adhesive layer 3 is bonded to the surface of the functional layer 2, it is wound onto a core to form an adhesive tape. Two parallel tangent lines 5 are cut on both sides of the support layer 1 of the adhesive tape to form the functional layer 2. An easy-tear line 4 is formed on the functional layer 2 between the two tangent lines 5. Tearing the easy-tear line 4 tears the support layer 1 along the trajectory of the tangent line 5 in the functional layer 2, aligning and overlapping the cuts of the functional layer 2 and the support layer 1, forming a first easy-tear opening 6 on the adhesive tape. When the adhesive tape is cut, second easy-tear openings 7 are formed on both sides of the end of the easy-tear line 4.

[0025] Used as adhesive tape. Simultaneously, when the tangent 5 is a serrated tangent 5a. After the adhesive tape is bonded and sealed to the box, it is cut (using a cutter or laser cutter), forming second tear-away openings 7 on both sides of the ends of the tear strips 4 at both ends of the adhesive tape. When opening the box, the tear strip 4 is torn from the second tear-away opening 7 at one end of the adhesive tape by tearing one end of the tear strip 4. During the tearing process, the support layer 1 is guided to tear along the trajectory between the cracks of the serrated tangent 5a on the functional layer 2; the torn adhesive tape has two parallel serrated edges, and the cut between the serrated edges forms a first tear-away opening 6, through which the adhesive tape is torn.

[0026] It should be noted that after the adhesive tape tears the support layer 1 along the serrated tangent 5a through the second tear-away opening 7, a serrated cut is formed on the support layer 1, which together with the serrated cut formed on the functional layer 2 forms the first tear-away opening 6. Furthermore, the shape of the serrated cut on the support layer 1 is consistent with the shape of the serrated tangent 5a on the functional layer 2, and the two are aligned and overlapped. The greater the degree of overlap, the easier it is to tear the first tear-away opening 6, and the better the tearing effect (misalignment within acceptable limits is allowed for the overlapping serrated tangents 5a on both sides of the support layer 1).

[0027] Preferably, the support layer 1 is used to ensure the strength of the adhesive tape, and the functional layer 2 enables easy tearing, which is suitable for composite membrane structures in which the support layer 1 and the functional layer 2 are connected by an adhesive.

[0028] Example 2 See attached document Figure 1 , Figures 3-6 as well as Figure 8 As shown, the easy-tear adhesive tape according to an embodiment of the present invention includes at least a support layer 1. A functional layer 2 is provided on one side of the support layer 1. After an adhesive layer 3 is bonded to the surface of the functional layer 2, it is wound onto a core to form an adhesive tape. Two parallel tangent lines 5 are cut into the functional layer 2 on one side of the support layer 1, and an easy-tear line 4 is formed on the functional layer 2 between the two tangent lines 5. Tearing the easy-tear line 4 tears the support layer 1 along the trajectory of the tangent line 5 in the functional layer 2. The cuts of the functional layer 2 and the support layer 1 are aligned and overlapped, forming a first easy-tear opening 6 on the adhesive tape. When the adhesive tape is cut, second easy-tear openings 7 are formed on both sides of the end of the easy-tear line 4.

[0029] When the adhesive tape is used as adhesive tape, and the tangent 5 is a serrated tangent 5a, after the adhesive tape is bonded and sealed to the box opening (functional layer 2 is attached to the surface of the carton), the adhesive tape is cut (using a cutter or laser cutter), forming a second tear-away 7 on both sides of the ends of the tear strips 4 at both ends of the adhesive tape. When opening the box, tear one end of the tear strip 4, causing the tear strip 4 to tear from the second tear-away 7. During the tearing process, the support layer 1 is guided to tear along the trajectory of the serrated tangent 5a on the functional layer 2; the torn adhesive tape has two parallel serrated edges, and the cut between the serrated edges forms a first tear-away 6, through which the adhesive tape is torn.

[0030] Preferably, the support layer 1 is used to ensure the strength of the adhesive tape, and the functional layer 2 enables the adhesive tape to be easily torn. This is suitable for a co-extruded composite film structure in which the support layer 1 and the functional layer 2 are connected by thermal fusion. The composite connection mainly refers to two connection methods: adhesive bonding and thermal fusion.

[0031] The serrated tangent 5a can be a series of triangular or semi-circular cuts arranged continuously or at intervals. These triangular or semi-circular cuts are formed on both sides of the easy-tear strip 4 on the adhesive tape.

[0032] When the functional layer 2 is cut with continuously or intermittently arranged serrated tangents 5a, a row of outwardly protruding triangular structures are formed on both sides of the easy-tear line 4. The triangles are connected by arc-shaped edges to prevent the easy-tear line 4 from breaking during tearing. After tearing the easy-tear line 4, a row of concave triangular or semi-circular arc-shaped cuts are formed on the adhesive tape. The cut is the first easy-tear opening 6 (the first easy-tear opening 6 is formed by tearing the support layer 1 along the trajectory of the serrated tangent 5a crack in the functional layer 2, and the serrated cuts formed on the support layer 1 and the serrated cuts of the serrated tangent 5a on the functional layer 2 together form the first easy-tear opening 6. Furthermore, the shape of the serrated cuts formed on the support layer 1 is aligned and overlapped with the angled cuts of the serrated tangent 5a on the functional layer 2, and the shape and angle are consistent), and the adhesive tape is torn through the first easy-tear opening 6.

[0033] The serrated tangent 5a has an angle of 10-150° on the functional layer; more preferably, the serrated tangent 5a has an angle of 60 degrees or 90 degrees. After being torn by the easy-tear strip 4, a first easy-tear opening 6 is formed, and the first easy-tear opening 6 has an angle of 10-150° on the adhesive tape; more preferably, the first easy-tear opening 6 has an angle of 60 degrees or 90 degrees.

[0034] It should be noted that the adhesive tape seals the opening and sides of the box, or wraps around the two openings of the box for sealing. The easy-tear strip 4 in the adhesive tape is located directly above the opening of the box. The adhesive tape does not create a cross-shaped seal, making it suitable for some small or lightweight boxes. The adhesive tape seals the box by bonding. To open the box, pull the easy-tear strip 4 to tear the adhesive tape, and the box seal is torn longitudinally. The edges of the box are opened by tearing through the first easy-tear openings 6 on both sides of the adhesive tape (i.e., the first easy-tear openings 6 tear laterally), completing the overall opening of the box. In this embodiment, the support layer 1 is made of plastic film, easy-tear film, or paper, and the functional layer 2 is made of plastic film.

[0035] In Examples 1 and 2, the easy-tear strip 4 is used to tear the adhesive tape longitudinally (longitudinal refers to the length direction of the adhesive tape), and the first easy-tear opening 6 is used to tear the adhesive tape transversely (transverse refers to the width direction of the adhesive tape).

[0036] Preferably, in order to save on the amount of adhesive tape used and to ensure the bonding strength of the adhesive tape, easy-tear adhesive tape is used at the top opening of the box, and ordinary adhesive tape is used at the bottom opening of the box for load-bearing.

[0037] In Embodiments 1 and 2 of the present invention, the serrated tangent 5a on the functional layer 2 is indented, partially cut or fully cut to ensure that the support layer 1 is intact and not cut, effectively ensuring the strength of the adhesive strip and adhesive tape.

[0038] Specifically, scratches or indentations are formed on the surface of functional layer 2 through the indentation process in die cutting; or the surface of functional layer 2 is partially cut through the half-cut process; or the surface of functional layer 2 is cut through the whole-cut process; or the half-cut or whole-cut of functional layer 2 is achieved through laser cutting.

[0039] The support layer 1 and functional layer 2 can be a composite film composed of a single support layer 1 and a single functional layer 2, or the support layer 1 and functional layer 2 can be a composite film (adhesive composite film or multilayer co-extruded film). During cutting, ensure that at least one support layer 1 in the multilayer support layer 1 is intact.

[0040] Preferably, in the multi-layer support layer 1 structure, the outermost layer or the innermost adjacent support layer 1 is a plastic film with good tensile strength; during die cutting, the plastic film with good tensile strength can prevent the outermost support layer 1 from being cut and broken, thus ensuring the integrity of the outermost support layer 1.

[0041] In practice, the smaller the apex angle (inclusive angle) of the cut of the serrated tangent 5a on the functional layer 2 (the smaller the radius of curvature), the more conducive it is to the first easy-tear opening 6 to tear the adhesive tape.

[0042] To ensure that the support layer 1 can completely conform to the trajectory of the serrated tangent 5a during tearing, it can be achieved in the following way: 1. By using a high-strength adhesive (such as a two-component polyurethane adhesive), the interlayer adhesion between the support layer 1 and the functional layer 2 is improved, resulting in a higher peel strength between them. This allows the support layer 1 to tear along the serrated tangent line 5a, preventing delamination during the tearing process of the support layer 1 along the tangent line of the functional layer 2.

[0043] 2. While ensuring tensile strength, appropriately reduce the thickness of support layer 1 so that the thickness of support layer 1 is less than the thickness of functional layer 2, which is conducive to the tearing of support layer 1 along the trajectory.

[0044] 3. Use low-strength plastic film to prevent the film from stretching and deforming during the tearing process.

[0045] 4. Using a plastic film with a transverse tear force less than a longitudinal tear force, the support layer 1 is more likely to tear laterally along the trajectory at the corner of the serrated tangent 5a during the tearing process.

[0046] 5. Support layer 1 uses an easy-tear film. The easy-tear film is usually a composite film structure. The easy-tear film enables the support layer 1 to be stably torn in the horizontal and vertical directions.

[0047] Example 3 Reference Figures 9-12As shown, the easy-tear adhesive tape provided according to this embodiment includes at least a support layer 1. One or both sides of the support layer 1 are provided with functional layers 2. After the surface of the functional layer 2 is bonded with an adhesive layer 3, it is wound onto the core to form an adhesive tape. Two parallel tangent lines 5 are cut on one or both sides of the support layer 1 of the adhesive tape to form the functional layer 2. An easy-tear tear line 4 is formed on the functional layer 2 between the two tangent lines 5.

[0048] When used as adhesive tape, and when the tangent 5 is a straight tangent 5b, the adhesive tape is wrapped around the opening at the overlapping edge of the cap and the box, bottle, or case to achieve a sealed packaging. By cutting the adhesive tape, second tear-off openings 7 are formed on both sides of the ends of the tear strips 4. By tearing one end of the tear strip 4, the tear strip 4 tears from the second tear-off openings 7 at both ends of the adhesive tape. When opening the box, completely tear off the tear strip 4 to separate the cap from the box, bottle, or case.

[0049] When the easy-tear lines 4 on the functional layer 2 are parallel straight tangent lines 5b, it can ensure that the adhesive tape can be easily torn open through the easy-tear lines 4.

[0050] Preferably, the support layer 1 and the functional layer 2 are made of easy-tear film material, such as easy-tear plastic film or paper material (which can be torn by hand). After the easy-tear pull line 4 tears the adhesive tape longitudinally through the parallel straight tangent lines 5b, the adhesive tape can be torn laterally by hand.

[0051] Example 4 Reference Figures 13-20 , Figure 22 As shown, the easy-tear adhesive strip according to an embodiment of the present invention includes at least a support layer 1. A functional layer 2 is compositely connected to one or both sides of the support layer 1. After the adhesive layer 3 is compositely connected to the surface of the functional layer 2, the adhesive strip is cut and pasted onto the surface of the release paper 11 to form an adhesive strip. A tangent line 5 is cut along one edge of the adhesive strip, and the cut between the tangent lines 5 forms a first easy-tear opening 6.

[0052] The adhesive strip is used as a sealing label. One edge of the adhesive strip is cut with a serrated line 5a, while the other three edges are straight. To use, tear the adhesive strip from the side without the serrated line 5a. This ensures the strip won't break during tearing and makes it easy to remove. To break the adhesive strip, tear it from the side with the serrated line 5a.

[0053] Adhesive strips are used as sealing labels to seal the open bag body. Figure 13The serrated tangent 5a faces the bag opening. Additionally, an adhesive strip seals the open bag body; the adhesive strip can also be adhered to the bag surface and peeled off for secondary sealing. In this embodiment, the adhesive strip is bonded to the surface of the release paper 11 to form a label (sealing label), or it can be made into a continuous roll film.

[0054] When the adhesive layer 3 of the adhesive strip uses a high-strength adhesive, adhesive layers 3 are bonded together to prevent the adhesive strip or tape from being torn after sealing. When the adhesive force is greater than the tensile deformation force of the adhesive strip, the anti-tampering function of the sealing tape is achieved by checking whether the adhesive strip is deformed or shows obvious signs of use. At the same time, adhesive strips made of plastic or paper-plastic composite materials cannot be restored after being torn once.

[0055] Preferably, the adhesive strip has two parallel serrated tangent lines 5a at its edge and middle. Figure 17 The serrated tangent 5a in the middle position is a triangular cut or a semi-circular arc cut; or a straight cut of one or more parallel straight tangents 5b, a curved tangent 5c, or an arc-shaped tangent 5d; the serrated tangent 5a, straight tangent 5b, curved tangent 5c, or arc-shaped tangent 5d in the middle position only cuts the adhesive strip, so that the adhesive strip seals and adheres to prevent opening, and its placement in the middle position can also ensure the connection strength on one side of the bag.

[0056] Preferably, when a serrated tangent 5a is cut along one edge of the adhesive strip, the functional layer 2 is provided with straight tangents 5b and / or creases perpendicular to the serrated tangent 5a. Figure 18 ) When used as a sealing label, the adhesive strip is adhered to the surface of the release paper 11. When the adhesive strip is used to seal the bag, the straight tangent 5b located in the center facilitates alignment and overlap during application. The adhesive strip adhered to the surface of the release paper 11 can be pre-folded to create a crease. The crease overlaps with the straight tangent 5b.

[0057] More preferably, when a serrated tangent 5a is cut on one side of the adhesive strip ( Figure 19 The adhesive strip has dotted lines 5e and / or creases that are perpendicular to the serrated tangent 5a.

[0058] Meanwhile, the dotted break lines 5e arranged at intervals are allowed to maintain a certain distance from the edge of one side of the non-serrated tangent line 5a of the adhesive strip. Among them, the lines between the dotted break lines 5e are in the form of straight tangent lines 5b, and the cuts are straight cuts.

[0059] Preferably, when a tangent 5 is cut into one edge and / or surface of the adhesive strip, the tangent 5 is one or more parallel lines. Figure 20The edge of the adhesive strip can also be cut with one of the following: parallel straight lines, curved lines, or arc-shaped lines.

[0060] Specifically, adhesive strips are used as sealing labels. They are used to seal the openings of plastic bags or open bags of bulk goods in supermarkets. A high-strength adhesive is used to ensure that the adhesive layer 3 of the adhesive strip adheres firmly to the other side. Combined with a high-strength plastic film (such as co-extruded film) or easily tearable paper or paper-plastic material, the adhesive strip deforms when stretched after bonding, achieving an tamper-proof function. In use, the user tears the adhesive strip in one go through the first easy-tear opening 6 on the serrated tangent 5a, easily opening the sealed packaging. Once torn, the adhesive strip undergoes plastic deformation and cannot return to its original shape.

[0061] To ensure the adhesive strip is aligned when sealing, first attach one side of the adhesive strip to the bag opening where it is wrapped in a line. Then, fold the adhesive strip in half at the straight tangent 5b, dotted line 5e, or crease in the middle of the strip. After folding, press the adhesive strip to fold and adhere the adhesive layer 3 side together, thus sealing the bag opening.

[0062] Example 5 See attached document Figure 5 , Figure 21 , Figure 22 As shown, the easy-tear adhesive strip according to an embodiment of the present invention includes at least a support layer 1, a functional layer 2 is compositely connected to one or both sides of the support layer 1, and an adhesive layer 3 is compositely connected to the surface of the functional layer 2. Two hollowed-out tangent lines 5 are cut along the middle of the adhesive strip, and the cut between the tangent lines 5 forms a first easy-tear opening 6.

[0063] Adhesive tape is cut into adhesive strips, which are used as sealing labels. In use, two adhesive strips with serrated tangents 5a on the sides are arranged in parallel, with the sides with serrated tangents 5a facing each other. The adhesive strips are made by cutting them to the required length. The adhesive layer 3 of the adhesive strip is pasted onto the surface of the release paper 11, or the adhesive strips and tapes are made into a continuous roll film.

[0064] Adhesive strips, acting as sealing labels, are affixed to the opening of the box to seal the lid and box, achieving the purpose of sealing the box. The area between the serrated tangents 5a on the inner sides of the two adhesive strips is the opening area. By pressing and prying open the edge of the box or lid in this opening area, the adhesive strips on both sides are torn off at the first easy-tear opening 6 of the serrated tangent 5a, separating the connected lid and box. The outer side of the adhesive strip, without the serrated tangent 5a, connects the box and lid. Because the outer side of the adhesive strip lacks the easy-tear opening structure of the serrated tangent 5a, pressing the edge of the box or lid on the outer side of the adhesive strip will not open the box, ensuring the connection strength of the easy-tear sealing label and preventing accidental opening of the box or lid due to misoperation or accidental pressing.

[0065] Specifically, when the adhesive strip is used as a right-angle sealing label, the tangent line 5 is distributed in a direction perpendicular to the opening direction of the box and the lid. Figure 21 Pressing the edge of the box or lid between the two adhesive strips or tapes will cause the lid to tear easily from the first tear-off point 6 along the serrated tangent 5a at the opening. However, if the edge of the box or lid is pressed from the area without the serrated tangent 5a on the outside of the adhesive strip or tape, the adhesive strip cannot be torn due to the lack of this structure. This ensures the connection strength of the adhesive strips and prevents accidental or unintentional opening of the box. Preferably, the adhesive strips or tapes are made of heat-shrink film, which deforms when heated, preventing the connected adhesive strips from being peeled off by heat.

[0066] Preferably, when used in textured anti-counterfeiting labels, each label is ensured to be torn and destroyed when the box is opened, preventing the textured anti-counterfeiting labels from being reused and achieving a better anti-counterfeiting effect.

[0067] Preferably, two oppositely distributed serrated tangents 5a are partially connected to form one or more spaced through holes 9. Furthermore, the cut between the two serrated tangents 5a on opposite sides of the edge of the through hole 9 forms a first tear-away opening 6.

[0068] Example 6 like Figure 13 , Figures 15-16 As shown, this application discloses an easy-tear adhesive strip, including a support layer 1 or a functional layer 2, with an adhesive layer 3 bonded to the surface of the support layer 1 or functional layer 2 to form the adhesive strip; a tangent line 5 is cut along one edge and / or surface of the adhesive strip, or two oppositely distributed tangent lines 5 are cut along the middle of the adhesive strip, and the cut between the tangent lines 5 forms a first easy-tear opening 6. This embodiment is used in the same way as embodiment 4 or embodiment 5.

[0069] Example 7 like Figures 23-36 As shown, this application also discloses an easy-tear adhesive strip, which includes at least a support layer 1. One or both sides of the support layer 1 are compositely connected with a functional layer 2. After the surface of the functional layer 2 is compositely connected with an adhesive layer 3, the adhesive strip is cut and pasted onto the surface of the release paper 11 to form an adhesive strip. A tangent line 5 is cut along one edge and / or surface of the adhesive strip or a hollowed-out tangent line 5 is cut along the middle of the adhesive strip and two oppositely distributed tangent lines 5 are cut. The cut between the tangent lines 5 forms a first easy-tear opening 6.

[0070] It may include a support layer 1 or a functional layer 2, and a bonding adhesive layer 3 is laminated on the surface of the support layer 1 or the functional layer 2 to form an adhesive strip.

[0071] The adhesive strip has at least one through hole 9, and two oppositely distributed tangent lines 5 are cut on the opposite sides of the edge of the through hole 9.

[0072] As described in Example 5, serrated tangent lines 5a are cut along the middle of the adhesive strip or tape, with the cuts on both sides being opposite each other. The cuts between the serrated tangent lines 5a form a first easy-tear opening 6. Connecting the two ends of the two oppositely distributed serrated tangent lines 5a achieves the effect of a through hole. Furthermore, the cuts between the serrated tangent lines 5a form the first easy-tear opening 6.

[0073] When the adhesive strip is used as a sealing label, it can be used for two-hole connections (9) for separating the lid and box, or for a single-hole connection (9) for movably connecting the lid and box. Patterns or logos can be placed on the adhesive strip. Alternatively, receipt information can be printed on the adhesive strip before sealing the box opening.

[0074] The adhesive strip has at least one through hole 9, and two opposing serrated tangent lines 5a are cut on opposite sides of the edge of the through hole 9. The serrated tangent lines 5a can be continuous or spaced out as triangular cuts or semi-circular arc cuts. The serrated tangent lines 5a in the through hole 9 can be distributed in the following ways: parallel symmetrical distribution, oblique symmetrical distribution, and arc-shaped symmetrical distribution. Special cases of the opposing distribution include a single-ring serrated structure and an asymmetrical distribution.

[0075] Preferably, to ensure the sealing performance of the adhesive strip, in a special case, the through-hole 9 in the adhesive strip contains at least one or more parallel straight tangent lines 5b and / or curved tangent lines 5c and / or arc-shaped tangent lines 5d in the easy-tear sealing label. The direction of the straight tangent line 5b is parallel to the direction of the box opening.

[0076] Preferably, the adhesive strip is made of plastic film or paper-plastic composite material.

[0077] Example 8 like Figures 36-37 As shown, based on Examples 1-3, to further improve the tearing effect of the adhesive tape, inwardly inclined oblique cuts 8 are provided on both sides of the adhesive tape. The oblique cuts 8 cut diagonally through the surface of the adhesive tape, creating oblique lines. The two oblique cuts 8 are distributed in a figure-eight shape at the edges of both sides of the adhesive strip / tape. The oblique cuts 8 are used to tear the adhesive tape by hand without the aid of tools.

[0078] Preferably, the oblique cut 8 adopts a straight tangent 5b, and the cut of the straight tangent 5b is a straight cut.

[0079] Preferably, the oblique cut 8 is mainly used for lateral tearing of the adhesive tape.

[0080] Specifically, there are diagonal slits distributed along both edges of the adhesive tape, spaced apart on the tape. To use, hold both ends of the diagonal slits and pull to tear the tape by hand.

[0081] It should be noted that the functional layer 2 on the adhesive tape is at least one layer, and can also be a multi-layer structure. Specifically, the serrated tangent 5a in the functional layer 2 is integrated with the printed layer 10 within a single functional layer (e.g., Figure 36 Alternatively, the serrated tangent 5a and the printed layer 10 are distributed in different functional layers.

[0082] Specifically, the printing layer 10 prints patterns, text, or logos on the surface of the functional layer 2, indicating the positions of the first easy-tear opening 6, the second easy-tear opening 7, and the oblique cut 8. Patterns, text, and logos are set at the easy-tear strip 4 of the adhesive tape to indicate the function and usage of the easy-tear strip 4.

[0083] Specifically, a zipper pattern, arrow mark, or text prompt is set on the easy-tear strip 4 to indicate to the user that the adhesive tape can be opened through the easy-tear strip 4.

[0084] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An easy-tear adhesive strip, characterized in that, It includes at least a support layer (1); One or both sides of the support layer (1) are composite connected with a functional layer (2). After the surface of the functional layer (2) is composite connected with an adhesive layer (3), it is wound on the core to form an adhesive tape or the adhesive tape is cut and pasted onto the surface of the release paper (11) to form an adhesive strip. Two parallel tangent lines (5) are cut into the functional layer (2) on one or both sides of the support layer (1) of the adhesive tape, and an easy-tear line (4) is formed on the functional layer (2) between the two tangent lines (5). The tangent (5) may be cut along one edge and / or surface of the adhesive strip or cut along the middle of the adhesive strip and two oppositely distributed tangents (5) may be cut, and the cut between the tangents (5) forms the first easy-tear opening (6).

2. The easy-tear adhesive strip according to claim 1, characterized in that, The tangent (5) is one of the following: a zigzag tangent (5a), a straight tangent (5b), a curved tangent (5c), or an arc-shaped tangent (5d).

3. The easy-tear adhesive strip according to claim 2, characterized in that, The serrated tangent (5a) is a triangular cut or a semi-circular arc cut that is continuously arranged or spaced out with an included angle; the straight tangent (5b) is a straight cut; the curved tangent (5c) and the arc tangent (5d) are arc cuts.

4. The easy-tear adhesive strip according to claim 3, characterized in that, The angle between the first easy-tear opening (6) and the triangular cut and semi-circular cut located on the functional layer (2) is between 10 and 150°.

5. The easy-tear adhesive strip according to claim 1, characterized in that, When the edge and / or surface of one side of the adhesive strip is cut with the tangent (5), the tangent (5) is one or more parallel lines.

6. The easy-tear adhesive strip according to claim 1, characterized in that, When two parallel tangent lines (5) are cut on the functional layers (2) on both sides of the support layer (1), the tangent lines (5) are aligned and overlap each other.

7. The easy-tear adhesive strip according to claim 1, characterized in that, Tear the easy-tear line (4) and tear the support layer (1) along the tangent line (5) in the functional layer (2) so that the cut of the functional layer (2) and the support layer (1) are aligned and overlapped, forming the first easy-tear opening (6) on the adhesive tape; when the adhesive tape is cut, the second easy-tear opening (7) is formed on both sides of the end of the easy-tear line (4).

8. The easy-tear adhesive strip according to claim 1, characterized in that, The tangent (5) on the functional layer (2) is made by indentation, half cutting or full cutting.

9. The easy-tear adhesive strip according to claim 2, characterized in that, When the edge of the adhesive strip is cut with the tangent (5), the functional layer (2) is provided with the straight tangent (5b) and / or crease that are perpendicular to the tangent (5).

10. The easy-tear adhesive strip according to claim 1, characterized in that, When the tangent (5) is cut on one side edge of the adhesive strip, the adhesive strip or adhesive tape is provided with dotted break lines (5e) and / or creases that are perpendicular to the tangent (5).

11. The easy-tear adhesive strip according to claim 1, characterized in that, The adhesive strip has inwardly inclined oblique cuts (8) on both sides.

12. The easy-tear adhesive strip according to claim 1, characterized in that, The adhesive strip has at least one through hole (9), and two oppositely distributed tangent lines (5) are cut on the edges of the through hole (9).

13. An easy-tear adhesive strip, characterized in that, It includes a support layer (1) or a functional layer (2), and the surface of the support layer (1) or the functional layer (2) is bonded with an adhesive layer (3) to form an adhesive strip; a tangent (5) is cut along one edge and / or surface of the adhesive strip or a hollowed-out tangent (5) is cut along the middle of the adhesive strip and two oppositely distributed tangents (5), and the cut between the tangents (5) forms a first easy-tear opening (6).

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