Easily-torn double-sided adhesive tape and processing technology thereof

Abstract

The invention relates to an easy-to-tear double-faced adhesive tape and a processing technology thereof. The easy-to-tear double-faced adhesive tape comprises a double-faced adhesive tape body, the release film is attached to the surface of the double faced adhesive tape, a hand tearing position is arranged on the edge of the release film in a protruding mode, and a fishhook-shaped breaking knife line is arranged at the connecting position of the release film and the hand tearing position. The processing technology comprises the following steps that S1, a release film is attached to a double-sided adhesive tape body, and a first-stage material belt is formed; s2, the first-stage material belt is subjected to first-stage punching die cutting on a first-stage punching die cutting machine, a knife breaking line is punched, the release film is damaged, and a second-stage material belt is formed; s3, the second-level material belt is subjected to second-level punching die cutting on a second-level punching die cutting machine, punching is conducted downwards from the side with the hand tearing position, and a third-level material belt is formed; and S4, the third-stage material belt is subjected to third-stage punching die cutting on a third-stage punching die cutting machine, the appearance of the easy-to-tear double-faced adhesive tape is punched, and machining is completed. Compared with the prior art, local areas of the release film can be torn up, stress points are reduced, and therefore the release film can be torn off conveniently, and stripping of the double-faced adhesive tape is facilitated.

Description

Technical Field

[0001] The present invention relates to a kind of, in particular to an easily tearable double-sided adhesive tape and its processing technology. Background Art

[0002] The double-sided adhesive tape is a roll-shaped adhesive tape made by using paper, cloth, or plastic film as the base material and uniformly coating an elastomeric pressure-sensitive adhesive or a resin-type pressure-sensitive adhesive on the above base material. It consists of three parts: the base material, the adhesive, and the release paper (film). According to the adhesive property, it can be divided into solvent-type adhesive tape (oil-based double-sided adhesive), emulsion-type adhesive tape (water-based double-sided adhesive), hot-melt adhesive tape, calendered adhesive tape, and reactive adhesive tape. It has characteristics such as high temperature resistance, solvent resistance, anti-aging, and good adhesion, and its performance is stable and reliable.

[0003] The double-sided adhesive tape plays a role of fixed bonding on the workpieces of electronic products. Some workpieces are relatively special. After the double-sided adhesive tape is attached to the workpiece, it is very difficult to tear off the release paper in the subsequent process, and additional working hours are required to tear it off, thus affecting the processing cost. The commonly used manufacturing method in this industry is: attaching the double-sided adhesive tape raw material to the release surface of the release film, first using a die cutter to punch out the tear-off position, discharging the waste double-sided adhesive tape at the tear-off position of the double-sided adhesive tape, and then using a die cutter to punch out the product shape. At present, during the production process of the double-sided adhesive tape, when using the release film as the tear-off position, due to factors such as deep knife marks or unstable release film gram weight during the production process, the product becomes more difficult to peel off as time goes by. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned existing technologies and provide an easily tearable double-sided adhesive tape and its processing technology. When tearing off the double-sided adhesive tape, a local area of the release film can be torn up, reducing the stress point, thereby facilitating the tearing off of the release film and being beneficial to the peeling of the double-sided adhesive tape.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] On the one hand, the present invention provides an easily tearable double-sided adhesive tape, which includes:

[0007] The double-sided adhesive tape body;

[0008] The release film attached to the surface of the double-sided adhesive tape, with a tear-off position protruding at the edge of the release film, and a broken knife line in the shape of a fishhook is provided at the connection between the release film and the tear-off position.

[0009] Further, the sharp hook of the broken knife line is inside and the arc is outside.

[0010] Further, the tear-off position is located at the vertex of the short side of the release film, and its shape includes a rectangle, a circle, an ellipse, a semi-circle, and a triangle.

[0011] Further, the double-sided adhesive tape body includes paper, cloth, and plastic film.

[0012] Further, the release film includes polyethylene (PE) release film, polyethylene terephthalate (PET) release film, oriented polypropylene (OPP) release film, (PC) release film, polystyrene (PS) separator film, polymethyl methacrylate (PMMA) release film, biaxially oriented polypropylene (BOPP) release film, PE release film, plastic film, polypentene (TPX) release film, polyvinyl chloride (PVC) release film, polytetrafluoroethylene (PTFE) release film, (PET) release film, single-silicon release film, polyester release film, Teflon release film, composite release film, high-temperature resistant release film, polyphenylene ether release film, polytetrafluoroethylene separator film, polyethylene release film, composite release film (i.e., the substrate is composed of two or more materials).

[0013] On the other hand, the present invention also provides a processing technology for an easily tearable double-sided adhesive, including the following steps:

[0014] S1. Attach the release film to the double-sided adhesive body to form a first-level strip.

[0015] S2. Perform first-stage die cutting on the first-level strip on a first-stage die cutting machine, cut through the break knife line, and damage the release film to form a second-level strip.

[0016] S3. Perform second-stage die cutting on the second-level strip on a second-stage die cutting machine, cut downward from the side with a tear position, and remove the second-stage waste to form a third-level strip.

[0017] S4. Perform third-stage die cutting on the third-level strip on a third-stage die cutting machine, cut the outline of the easily tearable double-sided adhesive, and remove the third-stage waste to complete the processing.

[0018] Further, in steps S2, S3, and S4, upper guide posts and lower guide posts are provided on the first-stage die cutting machine, the second-stage die cutting machine, and the third-stage die cutting machine for positioning and guiding.

[0019] Further, in step S2, the cutting depth of the break knife line in the shape of a fishhook is equal to the thickness of the release film.

[0020] Further, in step S3, the second-stage die cutting machine is provided with a knife line matching the second-stage die cutting pattern.

[0021] Further, in step S4, the second-stage waste includes the double-sided adhesive waste at the tear position.

[0022] Further, in step S4, the third-stage waste includes the cut border waste.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] (1) When tearing off the double-sided tape, a local area of the release film can be torn up, reducing the stress points, thus facilitating the tearing off of the release film and being beneficial to the peeling of the double-sided tape.

[0025] (2) It solves the problem that the deep knife mark affects the poor peeling of the double-sided tape, increases the range of the specific gravity of the double-sided tape raw material, and reduces the production difficulty of the double-sided tape;

[0026] (3) It solves the problem that the double-sided tape leads to increased working hours and poor processes due to difficult peeling, thereby reducing the R & D cost of the double-sided tape and enhancing the customer experience. Description of the Drawings

[0027] Figure 1 Top view of the easily tearable double-sided tape shown in Embodiment 1;

[0028] Figure 2 Structural schematic diagram of the easily tearable double-sided tape shown in Embodiment 1;

[0029] Figure 3 First die-cutting schematic diagram of the easily tearable double-sided tape shown in Embodiment 1;

[0030] Figure 4 Second die-cutting schematic diagram of the easily tearable double-sided tape shown in Embodiment 1;

[0031] Figure 5 Third die-cutting schematic diagram of the easily tearable double-sided tape shown in Embodiment 1;

[0032] Figure 6 Top view of the double-sided tape shown in Comparative Example 1;

[0033] Figure 7 Structural schematic diagram of the double-sided tape shown in Comparative Example 1;

[0034] Figure 8 First die-cutting schematic diagram of the double-sided tape shown in Comparative Example 1;

[0035] Figure 9 Second die-cutting schematic diagram of the double-sided tape shown in Comparative Example 1.

[0036] Explanation of the markings in the figures:

[0037] 1 - Double-sided tape body, 2 - Release film, 201 - Hand tearing position, 202 - Knife-breaking line, 3 - Upper guide post, 4 - Lower guide post. Detailed Embodiment

[0038] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and the detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments. In the following embodiments or implementation manners, if there is no special description of the functional components or structures, it means that they are all conventional components or conventional structures adopted in the art to achieve the corresponding functions.

[0039] Embodiment 1

[0040] An easily tearable double-sided tape, see Figure 1 and Figure 2 , which includes:

[0041] A double-sided tape body 1;

[0042] A release film 2 attached to the surface of the double-sided tape 1. A tear position 201 is convexly provided at the edge of the release film 2, and a knife-breaking line 203 in the shape of a fishhook is provided at the connection between the release film 2 and the tear position 201.

[0043] In this embodiment, the sharp hook of the knife-breaking line 203 is inside and the arc is outward.

[0044] In this embodiment, the tear position 201 is located at the vertex of the short side of the release film 2, and its shape is rectangular.

[0045] In this embodiment, the double-sided tape body 1 is paper.

[0046] In this embodiment, the release film 2 is a PE release film.

[0047] The processing technology of this easily tearable double-sided tape, see Figures 3 to 5 , includes the following steps:

[0048] A1. Attach the release film 2 to the double-sided tape body 1 to form a primary strip;

[0049] A2. Perform primary die cutting on the primary strip on a primary die cutting machine to cut the knife-breaking line 203 and damage the release film 2 to form a secondary strip;

[0050] A3. Perform secondary die cutting on the secondary strip on a secondary die cutting machine, punch down from the side with the tear position 201, and remove the secondary die cutting waste to form a tertiary strip;

[0051] A4. Perform tertiary die cutting on the tertiary strip on a tertiary die cutting machine to cut the outer shape of the easily tearable double-sided tape and remove the tertiary die cutting waste to complete the processing.

[0052] In this embodiment, in steps A2, A3, and A4, upper guide posts 3 and lower guide posts 4 are provided on the primary die cutting machine, secondary die cutting machine, and tertiary die cutting machine for positioning and guiding.

[0053] In this embodiment, in step A2, the punching depth of the scoring line 203 is equal to the thickness of the release film 2.

[0054] In this embodiment, in step A3, a scoring line matching the second-stage die-cutting pattern is provided on the second-stage die-cutting machine.

[0055] In this embodiment, in step A3, the second-stage waste includes the double-sided adhesive waste at the tear position 201.

[0056] In this embodiment, in step A4, the third-stage waste includes the punched frame waste.

[0057] During the process of tearing off the easily tearable double-sided adhesive, a scoring line 203 is added at the tearing position of the release film 2 for scoring line treatment. When tearing off the release film 2, a local area of the release film 2 can be torn up, reducing the stress points and tearing off the tear position 201, so as to facilitate tearing off the entire release film 2 and making the easily tearable double-sided adhesive easy to peel off.

[0058] Comparative Example 1

[0059] A double-sided adhesive, see Figure 6 and Figure 7 , which includes:

[0060] Double-sided adhesive body 1;

[0061] A release film 2 attached to the surface of the double-sided adhesive 1, and a tear position 201 is convexly provided at the edge of the release film 2.

[0062] In this embodiment, the tear position 201 is located at the vertex of the short side of the release film 2 and has a rectangular shape. 345

[0063] In this comparative example, the double-sided adhesive body 1 is paper.

[0064] In this comparative example, the release film 2 is a PE release film.

[0065] In this comparative example, for the processing technology of this double-sided adhesive, see Figure 8 and Figure 9 , including the following steps:

[0066] B1. Attach the release film 2 to the double-sided adhesive body 1 to form a first-stage strip;

[0067] B2. Perform first-stage die-cutting on the first-stage strip on a first-stage die-cutting machine, punch down from the side with the tear position 201, remove the first-stage waste, and form a second-stage strip;

[0068] B3. Perform secondary die-cutting on the secondary material tape using a secondary die-cutting machine to cut the outer shape of the tearable double-sided adhesive, remove the secondary die-cut waste, and the processing is completed.

[0069] In this comparative example, in steps B2 and B3, an upper guide post 3 and a lower guide post 4 are provided on the primary die-cutting machine and the secondary die-cutting machine for positioning and guiding.

[0070] In this comparative example, in step B2, a knife line matching the primary die-cut pattern is provided on the primary die-cutting machine.

[0071] In this comparative example, in step B2, the primary die-cut waste includes the double-sided adhesive waste at the hand-tearing position 201.

[0072] In this comparative example, in step B3, the secondary die-cut waste includes the cut frame waste.

[0073] During the process of tearing off the double-sided adhesive, the acceptance point of the hand-tearing position 201 is relatively large, making it difficult to tear off the entire release film 2, and it is difficult to peel off the double-sided adhesive.

[0074] Although the present invention has been described in detail above with general descriptions, specific embodiments and experiments, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. An easily tearable double-sided adhesive tape, characterized in that, It includes: A double-sided adhesive body (1); A release film (2) adhered to the surface of the double-sided adhesive (1). A tear position (201) is convexly provided at the edge of the release film (2), and a knife-breaking line (203) in the shape of a fishhook is provided at the connection between the release film (2) and the tear position (201).

2. The easily tearable double-sided adhesive tape according to claim 1, characterized in that, The tip of the hook of the knife-breaking line (203) is inward and the arc is outward.

3. The easily tearable double-sided adhesive tape according to claim 1, characterized in that, The tear position (201) is located at the vertex of the short side of the release film (2).

4. The easily tearable double-sided adhesive tape according to claim 1, characterized in that, Its shape includes rectangle, circle, ellipse, semi-circle, triangle.

5. The processing technology of the easily tearable double-sided adhesive tape according to any one of claims 1 to 4, characterized in that, It includes the following steps: S1. Attach the release film (2) to the double-sided adhesive body (1) to form a primary strip; S2. Perform primary die-cutting on the primary strip on a primary die-cutting machine, cut the knife-breaking line (203), and damage the release film (2) to form a secondary strip; S3. Perform secondary die-cutting on the secondary strip on a secondary die-cutting machine, cut downward from the side with the tear position (201), and remove the secondary die-cutting waste to form a tertiary strip; S4. Perform tertiary die-cutting on the tertiary strip on a tertiary die-cutting machine, cut the outer shape of the easily tearable double-sided adhesive, and remove the tertiary die-cutting waste to complete the processing.

6. The processing technology of the easily tearable double-sided adhesive tape according to claim 5, characterized in that, In steps S2, S3, and S4, upper guide posts (3) and lower guide posts (4) are provided on the primary die-cutting machine, secondary die-cutting machine, and tertiary die-cutting machine for positioning and guiding.

7. The processing technology of the easily tearable double-sided adhesive tape according to claim 6, characterized in that, The cutting depth of the knife-breaking line (203) is equal to the thickness of the release film (2).

8. The processing technology of the easily tearable double-sided adhesive tape according to claim 6, characterized in that, The secondary die-cutting machine is provided with a knife line matching the secondary die-cutting pattern.

9. The processing technology of the easily tearable double-sided adhesive tape according to claim 6, characterized in that, The secondary die-cutting waste includes the double-sided adhesive waste at the tear position (201).

10. The processing technology of the easily tearable double-sided adhesive tape according to claim 6, characterized in that, The tertiary die-cutting waste includes the cut border waste.

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