Processing technology for improving reverse release
By cutting curves in the release film product area and combining them with a tear handle design, the problem of reverse release of double-sided adhesive is solved, enabling easy separation of the release film and double-sided adhesive and reducing the difficulty of peeling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-18
- Publication Date
- 2026-03-10
AI Technical Summary
In existing technologies, the reverse release problem of double-sided adhesives is difficult to control, especially in substrate-free double-sided adhesives. The release force of the release film is difficult to control within a small range, resulting in peeling difficulties.
A curve is cut out in the product area of the release film, extending from the center to the edge and running through the edge of the product area. Combined with the tear handle design, the peeling difficulty is reduced. The release film and double-sided adhesive are separated by gradually transitioning from the edge to the center.
By improving the processing technology, the force required to peel off the release film is reduced, making it easier to separate the release film from the double-sided adhesive and solving the problem of reverse release.
Smart Images
Figure CN121625259A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of die-cutting technology, and in particular to a processing technology for improving reverse release. Background Technology
[0002] In related technologies, with the continuous development and breakthroughs in electronic products, the die-cutting industry is transforming from traditional manual methods to CNC and automation. Core technologies include precision mold design, high-precision CNC equipment, and diverse material processing, combined with laser and rotary die technologies to achieve efficient, high-precision, and complex material processing. Double-sided adhesive is the core substrate for die-cutting, precision-processed into complex shapes to achieve key functions such as bonding, fixing, sealing, cushioning, conductivity, and electromagnetic shielding of electronic components. The problem of reverse release of double-sided adhesive (reverse release: when the release film is removed after product application, the double-sided adhesive that should remain on the backing material is removed) has always been a key issue in the die-cutting industry, especially for some substrate-free double-sided adhesives from 3M and Nitto. Currently, the reverse release problem can only be solved by selecting the release film material and controlling the release force of auxiliary materials. However, the release force of the release film is difficult to control within a very small range, therefore, there is an urgent need to solve the reverse release problem from other directions. Summary of the Invention
[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes an improved release liner processing technology that can more easily separate the release film from the double-sided adhesive, thereby improving the release liner problem.
[0004] An improved anti-release processing method according to an embodiment of the present invention includes the following steps: A curve is cut out for the product area of the release film. The curve extends from the center of the product area to the edge of the product area and runs through the edge of the product area. The curve runs through the thickness direction of the product area. The double-sided adhesive side of the composite material is bonded to the product area to obtain the first composite material.
[0005] According to an embodiment of the present invention, an improved release film processing technology has at least the following beneficial effects: This improved release film processing technology includes the following steps: First, a curve is cut into the product area of the release film. The cut curve runs through the thickness direction of the product area, and the curve extends from the center of the product area to the edge of the product area and runs through the edge of the product area. Therefore, after the product area of the release film is laminated with the double-sided adhesive to obtain the first composite product, it is convenient to peel off from the edge of the product area and gradually transition to the center during peeling. The peeling force required is small, and the release film and double-sided adhesive can be easily peeled off. Therefore, the improved release film processing technology of this application, by cutting a curve from the edge of the product area of the release film to the center, makes it easier to separate the release film and double-sided adhesive when peeling off the release film from the edge, thus improving the problem of reverse release.
[0006] According to some embodiments of the present invention, the curve extends and bends from the edge of the tear handle in the product area toward the product part in the product area; wherein the product area includes interconnected tear handles and product parts.
[0007] According to some embodiments of the present invention, the curve is a spiral that winds inward toward the product area along the edge of the tear handle.
[0008] According to some embodiments of the present invention, the curve is an arc curve or a wavy line that bends and extends from the edge of the tear handle toward the product area.
[0009] According to some embodiments of the present invention, cutting a curve for the product area of the release film includes the following steps: Composite the release film with the base film; Cut a curve from the product area of the release film on the base film to obtain the second composite product.
[0010] According to some embodiments of the present invention, the method further includes the following step: peeling off the first paper from one side of a double-sided adhesive with a first paper on each side to obtain a double-sided adhesive composite.
[0011] According to some embodiments of the present invention, the method further includes the step of laminating one side of the double-sided adhesive composite with the side of the second composite with the release film to obtain the first composite.
[0012] According to some embodiments of the present invention, the following steps are also included: Die-cut the first face paper and double-sided adhesive on the first composite to obtain double-sided adhesive sheet, face paper sheet, double-sided adhesive frame waste and face paper frame waste; wherein, the double-sided adhesive sheet is located in the product area and its size is smaller than the product area; Dispose of waste double-sided tape frames and waste paper roll frames; After removing the paper sheet, a third composite product is obtained; A second paper is laminated onto one side of the third composite material that has double-sided adhesive sheet to obtain a fourth composite material.
[0013] According to some embodiments of the present invention, the following steps are also included: Die-cut the second sheet and release film on the fourth composite to form the release film into the product area and the release film frame waste, and the second sheet into the second sheet and the second frame waste. Discharge the waste from the release film frame and the second frame; Remove the second sheet to obtain the fifth composite product; The fifth composite product is laminated with the side of the double-sided adhesive sheet to the shipping tape to obtain the sixth composite product.
[0014] According to some embodiments of the present invention, the following steps are also included: Remove the base film from the sixth composite to obtain the seventh composite. Cover the side of the seventh composite material with the product area with a separator paper to obtain the finished product. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of one embodiment of the release film product area and double-sided adhesive sheet in the improved reverse release processing technology of the present invention.
[0016] Figure label: Product Area 100; Tear Handle 110; Product Department 120; Curve 121; Double-sided Adhesive Sheet 200. Detailed Implementation
[0017] The embodiments of this application are described in detail below. Examples of these embodiments 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 below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0018] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, 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 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, they should not be construed as limitations on this application.
[0019] In the description of this application, "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. The use of "first" and "second" in the description is merely for 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.
[0020] In the description of this application, unless otherwise expressly defined, terms such as "setup," "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 application in conjunction with the specific content of the technical solution.
[0021] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0022] The following is for reference. Figure 1 This invention describes an improved reverse release processing technology according to an embodiment of the present invention.
[0023] like Figure 1 As shown, an improved anti-release processing method according to an embodiment of the present invention includes the following steps: A curve 121 is cut out of the product area 100 of the release film. The curve 121 extends from the middle of the product area 100 to the edge of the product area 100 and runs through the edge of the product area 100. The curve 121 runs through the thickness direction of the product area 100. The double-sided adhesive side of the composite product is bonded to product area 100 to obtain the first composite product.
[0024] It is understood that this improved release film processing technology includes the following steps: First, a curve 121 is cut into the product area 100 of the release film. The cut curve 121 runs through the thickness direction of the product area 100. At the same time, the curve 121 extends from the middle of the product area 100 to the edge of the product area 100 and runs through the edge of the product area 100. Thus, after the product area 100 of the release film is laminated with the double-sided adhesive to obtain the first composite product, it is convenient to peel it off from the edge of the product area 100 and gradually transition to the middle. The peeling force required is small, and the release film and double-sided adhesive can be easily separated. Therefore, the improved release film processing technology of this application, by cutting the curve 121 from the edge of the product area 100 of the release film to the middle, makes it easier to separate the release film and double-sided adhesive when peeling the release film from the edge, thus improving the problem of reverse release.
[0025] Specifically, curve 121 extends from the middle of product area 100 to the edge of product area 100 and runs through the edge of product area 100. In this embodiment, the middle of product area 100 refers to the non-edge position of product area 100.
[0026] It is understood that curve 121 extends and curves from the edge of the tear handle 110 of the product area 100 towards the product portion 120 of the product area 100; wherein the product area 100 includes interconnected tear handles 110 and product portions 120. For example, as Figure 1 As shown, in this embodiment, by processing the product area 100 into a product section 120 and a tear handle 110 connecting the product section 120, when peeling off the product area 100 of the release film, when tearing off the product area 100 from the tear handle 110, the tear handle 110 immediately peels off the double-sided adhesive, and gradually peels off the product section 120 along the edge of the tear handle 110 in the direction of curve 121, thereby finally achieving the peeling off of the release film product area 100. By using the combination of the tear handle 110 and curve 121 for peeling, reverse release peeling is achieved more conveniently and quickly.
[0027] It is understandable that curve 121 is a spiral line formed by winding inward from the edge of the tear handle 110 towards the product area 100. For example, as... Figure 1 As shown, in this embodiment, curve 121 is a spiral extending from the edge of the tearing handle 110 to the product area 100, and the spiral gradually bends inward from the edge to the product area 100, thereby further reducing the difficulty of peeling and improving the problem of reverse release.
[0028] It is understood that curve 121 is an arc curve 121 or a wavy line extending from the edge of the tear handle 110 toward the product area 100. For example, in some other embodiments, in addition to a spiral line, curve 121 can also be an arc curve 121 or a wavy line extending from the edge of the tear handle 110 toward the product area 100. By peeling off the double-sided adhesive from the tear handle 110 along the shape of the arc curve 121 or wavy line, the risk of the double-sided adhesive being pulled away by the release film can be reduced, and the problem of reverse release can be improved.
[0029] It is understandable that cutting curve 121 into the product area 100 of the release film includes the following steps: Composite the release film with the base film; Curve 121 is cut out from the product area 100 of the release film on the base film to obtain the second composite product.
[0030] For example, such as Figure 1 As shown, in this embodiment, by attaching a support film to the bottom of the release film, damage to the die can be avoided when cutting the curve 121 of the product area 100 of the release film, ensuring that the product area 100 is cut through in the thickness direction.
[0031] Understandably, the process also includes the following steps: peeling off the first paper from one side of the double-sided adhesive tape that has the first paper on each side to obtain a double-sided adhesive composite.
[0032] For example, in this embodiment, the double-sided adhesive composite is first obtained by peeling off one side of the first paper from the double-sided adhesive raw material. The double-sided adhesive raw material is composed of double-sided adhesive and first paper respectively attached to both sides of the double-sided adhesive.
[0033] Understandably, the process also includes the following steps: laminating the side of the double-sided adhesive composite with the side of the second composite with the release film to obtain the first composite.
[0034] For example, in this embodiment, the first composite is obtained by laminating one side of the first paper with double-sided adhesive with the other side of the backing film with release film.
[0035] Understandably, this also includes the following steps: Die-cut the first face paper and double-sided adhesive on the first composite to obtain double-sided adhesive sheet 200, face paper sheet, double-sided adhesive frame waste and face paper frame waste; wherein, double-sided adhesive sheet 200 is located in the product area 100 and its size is smaller than the product area 100; Dispose of waste double-sided tape frames and waste paper roll frames; After removing the paper sheet, a third composite product is obtained; A second paper is laminated onto one side of the third composite material with double-sided adhesive sheet 200 to obtain a fourth composite material.
[0036] For example, in this embodiment, the first face paper and double-sided adhesive are die-cut on the first composite product, resulting in a double-sided adhesive sheet 200 that is smaller than the size of the release film product area 100. This makes it easier to peel off when removing the product area 100 and also avoids adhesive overflow. Specifically, during waste removal, the double-sided adhesive frame waste and face paper frame waste are removed first, and then the face paper sheet is removed using waste removal tape, thus obtaining the third composite product. The double-sided adhesive sheet 200 in the third composite product is located within the product area 100 and is smaller than the product area 100. Then, a second face paper is laminated onto the side of the third composite product with the double-sided adhesive sheet 200, thus obtaining the fourth composite product.
[0037] Understandably, this also includes the following steps: Die-cut the second face paper and release film on the fourth composite to form the release film into product area 100 and release film frame waste, and the second face paper into second sheet and second frame waste; Discharge the waste from the release film frame and the second frame; Remove the second sheet to obtain the fifth composite product; The fifth composite product is laminated with the side of the double-sided adhesive sheet 200 to the shipping material strip to obtain the sixth composite product.
[0038] For example, in this embodiment, the second paper and release film on the fourth composite are die-cut to obtain the product area 100 of the release film and the waste release film frame, as well as the second sheet and the waste release film frame. The waste release film frame is removed and the waste release film frame is taken away. Then, the second sheet is removed with tape to obtain the fifth composite. The fifth composite includes a double-sided adhesive sheet 200, a product area 100, and a backing film that are sequentially bonded from top to bottom. Then, a shipping tape is applied to the side of the fifth composite with the double-sided adhesive sheet 200 to obtain the sixth composite.
[0039] Understandably, this also includes the following steps: Remove the base film from the sixth composite to obtain the seventh composite. Cover the side of the seventh composite material with the product area 100 with a spacer paper to obtain the finished product.
[0040] For example, in this embodiment, the backing film on the sixth composite is removed, and then a separator paper is laminated onto one side of the original backing film to obtain the finished product. The finished roll material is easy to store and transport.
[0041] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application 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 this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.
Claims
1. A process for improving the reverse iontophoresis, characterized in that, The method comprises the following steps: cutting a curve on a product area of a release film, the curve extending from a middle of the product area to an edge of the product area to the edge of the product area, the curve penetrating a thickness direction of the product area; compositing a double-sided adhesive tape product with one side of the double-sided adhesive tape and the product area to obtain a first composite product.
2. The improved repeller-independent processing method of claim 1, wherein, The curve extends and bends from an edge of a tear-off area to a product area; wherein the product area comprises the tear-off area and the product area connected to each other.
3. The improved repeller-independent processing method of claim 2, wherein, The curve is a spiral line which spirals inward along the edge of the tear-off area towards the product area.
4. The improved repeller-independent processing method of claim 2, wherein, The curve is a circular arc curve or a wavy line which bends and extends along the edge of the tear-off area towards the product area.
5. The improved counter-ionic type processing process according to any one of claims 1 to 4, wherein The method of cutting the curve on the product area of the release film comprises the following steps: compositing the release film and a backing film; cutting the curve on the product area of the release film on the backing film to obtain a second composite product.
6. The improved repeller-independent processing method of claim 5, wherein, The method further comprises the following steps: peeling off one side of the double-sided adhesive tape product to obtain the double-sided adhesive tape product.
7. The improved repeller-independent processing method of claim 6, wherein, The method further comprises the following steps: compositing one side of the double-sided adhesive tape product with one side of the release film of the second composite product to obtain the first composite product.
8. The improved repeller-independent machining process of claim 7, wherein, The method further comprises the following steps: die cutting the first paper and the double-sided adhesive tape on the first composite product to obtain a double-sided adhesive tape sheet, a first paper sheet, a double-sided adhesive tape frame waste and a first paper frame waste; wherein the double-sided adhesive tape sheet is located in the area of the product area and has a size smaller than the product area; discharging the double-sided adhesive tape frame waste and the first paper frame waste; discharging the first paper sheet to obtain a third composite product; compositing a second paper on one side of the third composite product with the double-sided adhesive tape sheet to obtain a fourth composite product.
9. The improved repeller-independent processing method of claim 8, wherein, The method further comprises the following steps: die cutting the second paper and the release film on the fourth composite product to make the release film form the product area and a release film frame waste, and the second paper form a second sheet and a second frame waste; discharging the release film frame waste and the second frame waste; discharging the second sheet to obtain a fifth composite product; compositing one side of the fifth composite product with the double-sided adhesive tape sheet and a delivery material belt to obtain a sixth composite product.
10. The improved repeller-independent processing method of claim 9, wherein, The method further comprises the following steps: discharging the backing film on the sixth composite product to obtain a seventh composite product; covering a release paper on one side of the seventh composite product with the product area to obtain a finished product.