Anti-tearing and anti-layering double-faced adhesive tape foam assembly and production process thereof

Abstract

The invention relates to an anti-tearing layered double-faced adhesive tape foam assembly which comprises a foam layer, a first double-faced adhesive tape layer and a second double-faced adhesive tape layer, the first double-faced adhesive tape layer and the second double-faced adhesive tape layer are compounded on the two faces of the foam layer respectively, a first release film layer is compounded on the outer surface of the first double-faced adhesive tape layer, and the first release film layer is provided with a handle part protruding out of the first double-faced adhesive tape layer. A fracture line connected with the contour line of the handle part is also arranged in the first release film layer; and the outline of the foam layer is inwards contracted by 0.1-0.5 mm relative to the outline of the first double-sided adhesive layer and the outline of the second double-sided adhesive layer. According to the assembly, a'foam retraction 'structure and process are adopted, so that the double-sided adhesive layer and the foam form an edge covering structure, the problems that layering is caused by tearing in the use process of a client, and the client cannot use the assembly are solved, the installation yield of the client is increased, the use yield of the client can be increased from 30% to 98%, and meanwhile the production material cost is reduced; and adjacent products can be rolled without a gap during rolling after inward shrinkage, so that the utilization rate of rolled materials can be improved, and the production cost is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of precision die-cut component manufacturing technology, specifically to a tear-resistant, delaminated double-sided adhesive foam component and its manufacturing process. Background Technology

[0002] With the development of the electronics industry, the precision requirements for component products are becoming increasingly stringent. Some high-precision products require composite components made of foam with double-sided adhesive on both sides. Traditional foam double-sided adhesive components typically have the outlines of the foam, double-sided adhesive, release film, or release paper completely overlapping, with some release papers having protruding handles. This structure exposes the foam edges, making it prone to tearing and delamination during peeling, rendering the components unusable. This is especially true for small components with an overall size of less than 10mm, where the assembly success rate is only around 30%, resulting in high overall costs. In addition, existing structures generally require an extra 1-2mm interval between adjacent components during winding, increasing the amount of winding spacer paper and other materials needed, and increasing the volume. For example, when winding 30,000 components, the total interval between adjacent components can be as large as 30-60m, resulting in significant waste and cost issues. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a tear-resistant and delaminated double-sided adhesive foam assembly and its manufacturing process.

[0004] The technical solution adopted in this invention is: a tear-resistant, delaminated double-sided adhesive foam assembly, comprising a foam layer and a first double-sided adhesive layer and a second double-sided adhesive layer respectively laminated on both sides of the foam layer; a first release film layer is laminated on the outer surface of the first double-sided adhesive layer, and the first release film layer has a handle portion protruding from the first double-sided adhesive layer; the first release film layer also has a break line connected to the outline of the handle portion inside; a finished product protective film is also laminated on the outer surface of the first release film layer, and a second release film layer is laminated on the outer surface of the second double-sided adhesive layer; the double-sided adhesive... The foam assembly also has several clearance holes that simultaneously penetrate the second double-sided adhesive layer, the foam layer, the first double-sided adhesive layer, the first release film layer, and the finished protective film. The finished protective film completely covers the first release film layer, and assembly positioning holes are also provided at the four corners of the finished protective film. The second release film layer has the same outline as the finished protective film and completely covers the second double-sided adhesive layer. The outline of the foam layer is 0.1mm to 0.5mm smaller than the outlines of the first and second double-sided adhesive layers.

[0005] Preferably, the outline of the foam layer is recessed by 0.2 mm relative to the outlines of the first double-sided adhesive layer and the second double-sided adhesive layer; This invention also provides a manufacturing process for the above-mentioned tear-resistant and delaminated double-sided adhesive foam assembly, which is carried out through a high-speed rotary die-cutting production line. The manufacturing process includes the following steps: Step a: The finished protective film strip and the first release film strip are sequentially laminated onto the first base film strip. The first die-cutting is performed by the first circular die-cutting roller group. The first die-cutting is performed from above the strip. The handle outline that just cuts through the first release film strip and the break line connected to it are die-cut on the first release film strip. The first positioning mark line that cuts through the first release film strip and the finished protective film strip is also die-cut. Step b: A first double-sided adhesive tape is laminated onto the composite main material tape after the first die-cutting, and then the film on the first double-sided adhesive tape is peeled off. At the same time, in the opposite direction of the main material tape's movement, a foam tape is laminated onto the second bottom film tape after removing its own film, and then a second die-cutting is performed by the second circular die-cutting roller group. The second die-cutting enters from above the material tape and cuts out a complete outline of the foam layer on the foam tape, just cutting through the foam tape. At the same time, a second positioning mark line is formed on the second bottom film tape. Then, the waste foam tape outside the outline of the foam layer is removed, and the block foam attached to the second bottom film tape is flipped over by the first flipping roller group and laminated with the first double-sided adhesive tape on the main material tape. The second bottom film tape is then removed from above, forming the following from bottom to top: first bottom film tape, first release film tape with handle outline and break line, first double-sided adhesive tape, and formed foam layer. Step c: After step b, a second double-sided adhesive tape is laminated on top of the composite tape, and the film on the second double-sided adhesive tape is removed. Then, a first transition release film tape is laminated on top, and a third support film tape is laminated on the lower surface of the main tape. Then, a third die-cutting is performed by the third circular die-cutting roller group. The third die-cutting enters from above the tape and cuts out the complete outline of the second double-sided adhesive layer, the complete outline of the first double-sided adhesive layer, and the remaining outline of the first release film layer that just cuts through the first release film tape. The remaining outline of the first release film is connected to the handle part outline formed by the first die-cutting. The first release film layer complete outline is directly formed; and the second double-sided adhesive layer complete outline and the first double-sided adhesive layer complete outline are 0.1mm~0.5mm outward relative to the foam layer outline; the third die-cutting also cuts out the clearance hole outline and assembly positioning hole outline that penetrate the first transition release film strip, the second double-sided adhesive strip, the block foam, the first double-sided adhesive strip, the first release film strip, the finished protective film strip, and the first support film strip on the composite strip; and also cuts out two third positioning mark lines that correspond to the first positioning mark line and the second positioning mark line respectively; Then, the waste material outside the frame outside the closed contour line is removed from the top, including the waste material of the first transition release film strip, the waste material of the second double-sided adhesive strip, the waste material of the first double-sided adhesive strip, and the waste material of the first release film strip. The waste material of the third bottom support film strip, the waste material inside the clearance hole, and the waste material inside the assembly positioning hole are removed from the bottom. Then, the waste material of the first transition release film inside the closed contour line is removed by the waste removal tape. Then, the first bottom support film strip below is removed. At this time, the composite material strips from bottom to top are: finished protective film strip, first release film layer, first double-sided adhesive layer, foam layer, and second double-sided adhesive layer. Step d: After step c, a second release film strip is laminated on top of the second double-sided adhesive layer of the composite strip, and a fourth support film strip is laminated below. Then, a fourth die-cutting is performed by the fourth circular die-cutting roller group. The fourth die-cutting enters from above the strip and cuts out the overlapping outline of the second release film layer and the outline of the finished protective film layer. The outline of the second release film layer and the outline of the finished protective film layer completely surround the outline of the first release film layer. At the same time, a fourth positioning mark line is also cut out. Then, the waste of the second release film strip and the waste of the finished protective film strip are removed from the outline of the second release film layer and the outline of the finished protective film layer. Finally, the release paper is laminated from above the strip and the strip is wound up, and the fourth support film strip at the bottom is removed before winding.

[0006] Furthermore, the first circular die-cutting roller group has a handle and a break line blade corresponding to the handle contour line and the break line, and a first positioning mark line blade corresponding to the first positioning mark line; the second circular die-cutting roller group has a first closed blade corresponding to the foam layer outline contour line, and a corresponding second positioning mark line blade; the first closed blade is circular, and there are also 3 sets; the third circular die-cutting roller group has a second closed blade corresponding to the second release film layer outline line, and the second closed blade has a low blade section with a reduced blade height, and the reduction value is equivalent to the thickness of the first release film layer; this low blade section has a lower blade height. The shape of the blade segment is similar to the shape of the opening of the first release film layer handle portion outline. Its die-cutting depth is just enough to cut through the first double-sided adhesive tape but not through the first release film tape, while the remaining segments just cut through the first release film tape, thereby forming the handle portion of the first release film layer. The outline cut by the second closed blade is 0.1mm~0.5mm larger than the outline cut by the first closed blade on the second circular die-cutting roller group, that is, it does not cut the block foam, and the two unfolded diagrams are concentrically arranged. The fourth circular die-cutting roller group is provided with a frame-shaped closed blade corresponding to the outline of the second release film layer outer frame and the outline of the finished protective film layer outer frame. The present invention, through the above-described structure and process, has the following main advantages: Firstly, the components adopt a "foam shrinkage" structure and process, which makes the double-sided adhesive layer and foam form an edge-wrapping structure, solving the problems of tearing and delamination caused by customers during use, and making it unusable for customers, thereby improving the customer's installation yield. The customer's usage yield can be increased from 30% to 98%, while reducing the cost of production materials. Secondly, the production of circular die-cutting replaces the traditional flat die-cutting process, which greatly improves both production capacity and efficiency. Furthermore, when rewinding after shrinking, adjacent products can be rewound without gaps, thereby increasing the utilization rate of the rewound material and effectively reducing production costs. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the planar structure of a double-sided adhesive foam assembly according to an embodiment of the present invention; Figure 2 This is an exploded structural diagram of an embodiment of the present invention; Figure 3 This is a schematic diagram of the process of the present invention; Figure 4-1 , Figure 4-2 , Figure 4-3 , Figure 4-4 These are schematic diagrams showing the unfolded blades and die-cutting effects of the first, second, third, and fourth circular blade die-cutting roller groups in this invention. Figure 4-5 yes Figure 4-1 , Figure 4-2 , Figure 4-3 , Figure 4-4 A schematic diagram showing the superimposed die-cutting effects. Detailed Implementation

[0008] like Figure 1 , Figure 2As shown, the present invention relates to a tear-resistant, delaminated double-sided adhesive foam assembly, comprising a foam layer 1 and a first double-sided adhesive layer 21 and a second double-sided adhesive layer 22 respectively laminated on both sides of the foam layer 1. A first release film layer 31 is laminated on the outer surface of the first double-sided adhesive layer 21, and the first release film layer 31 has a handle portion 311 protruding from the first double-sided adhesive layer. The first release film layer 31 also has a break line 312 connected to the outline of the handle portion inside. A finished protective film 4 is laminated on the outer surface of the first release film layer 31, and a second release film layer 32 is laminated on the outer surface of the second double-sided adhesive layer 22. The double-sided adhesive foam assembly is also provided with several clearance holes 101 that simultaneously penetrate the second double-sided adhesive layer 22, the foam layer 1, the first double-sided adhesive layer 21, the first release film layer 31, and the finished protective film 4. The finished protective film 4 completely covers the first release film. Layer 31 has assembly positioning holes 401 at the four corners of the finished protective film 4. The second release film layer 32 has the same outline as the finished protective film 4 and completely covers the second double-sided adhesive layer 22. The outline of the foam layer 1 is 0.1mm to 0.5mm smaller than the outlines of the first double-sided adhesive layer 21 and the second double-sided adhesive layer 22. With the above structure, when peeling off the first release film layer 31, the force is easily released through the fracture line 312, reducing adhesion to the first double-sided adhesive layer 21 and avoiding tearing of the double-sided adhesive layer. Moreover, since the foam layer 1 is smaller than both the first and second double-sided adhesive layers 21 and 22, it will not be involved when peeling off, which can better protect the foam layer 1 and avoid foam cracking, delamination, etc., thereby ensuring the machine qualification rate of the product and saving costs. Preferably, the outline of the foam layer 1 is recessed by 0.2 mm relative to the outlines of the first double-sided adhesive layer 21 and the second double-sided adhesive layer 22. This invention also provides a manufacturing process for the above-mentioned tear-resistant and delaminated double-sided adhesive foam assembly, which is carried out through a high-speed rotary die-cutting production line. The manufacturing process includes the following steps: Step a: On the first base film strip T1, the finished protective film strip B1 and the first release film strip L1 are sequentially laminated. The first die-cutting is performed by the first circular die-cutting roller group M1. The first die-cutting is performed from above the strip. The handle part outline M101 that just cuts through the first release film strip L1 and the break line M102 connected to it are die-cut on the first release film strip L1. The first positioning mark line M103 that cuts through the first release film strip L1 and the finished protective film strip B1 is also die-cut. Step b: First double-sided adhesive tape J1 is laminated onto the composite main material tape after the first die-cutting, and then the self-film J11 of the first double-sided adhesive tape is peeled off. Simultaneously, above and behind the main material tape, in the opposite direction of the main material tape's movement, foam tape C1 is laminated onto the second backing film tape T2, after removing its self-film T21. Then, a second die-cutting is performed through the second circular die-cutting roller group M2. The second die-cutting enters from above the material tape, die-cutting out a complete foam layer outline M201 on the foam tape C1, precisely cutting through the foam tape C1. At the same time, a second positioning mark line M202 is formed on the second backing film tape T2. Then, the waste foam material C11 outside the outline of the foam layer M201 frame is removed, and the block foam attached to the second bottom film material T2 is flipped over by the first flipping roller group Z1 and aligned and bonded with the first double-sided adhesive material J1 on the main material belt. The second positioning mark line M202 is aligned with the first positioning mark line M103 to achieve precise positioning and bonding. Then, the second bottom film material T2 is removed from the top, forming the following from bottom to top: the first bottom film material T1, the first release film material L1 with the handle outline line M101 and the break line M102, the first double-sided adhesive material J1, and the formed foam layer 1. Step c: After step b, a second double-sided adhesive tape J2 is laminated on top of the composite tape, and the film J21 of the second double-sided adhesive tape is removed. Then, a first transition release film tape G1 is laminated on top, and a third bottom support film tape T3 is laminated on the lower surface of the main tape. Then, a third die-cutting is performed by the third circular die-cutting roller group M3. The third die-cutting enters from above the tape and cuts out the complete outline of the second double-sided adhesive layer, the complete outline of the first double-sided adhesive layer, and the remaining outline of the first release film layer M302 that just cuts through the first release film tape. The remaining outline of the first release film M301 is connected to the handle part outline M101 formed by the first die-cutting and directly constitutes the complete outline of the first release film layer. The complete outline of the second double-sided adhesive layer and the complete outline of the first double-sided adhesive layer M301 (i.e., Figure 4-3 The complete circle formed by the green and red arcs is 0.1mm~0.5mm outward relative to the outline of the foam layer M201; the third die-cutting also cuts out the outline of the clearance hole M303 and the outline of the assembly positioning hole M304 on the composite material strip, which pass through the first transition release film material strip G1, the second double-sided adhesive material strip J2, the block foam, the first double-sided adhesive material strip J1, the first release film material strip L1, the finished protective film material strip B1, and the first bottom support film material strip T1; it also cuts out two third positioning mark lines M305, which correspond to the first positioning mark line M103 and the second positioning mark line M202 respectively; In this embodiment, the third circular die-cutting roller group M3 has a second closed blade R301 on its blade roller that corresponds to the outline of the second release film layer. The second closed blade R301 has a low blade section R302 with a reduced blade height, and the reduction value is equivalent to the thickness of the first release film layer 31. The shape of the low blade section R302 is similar to the shape of the opening of the outline of the handle portion M101 of the first release film layer. Its die-cutting depth is just enough to cut through the first double-sided adhesive tape J1, but not through the first release film tape L1, while the remaining section just cuts through the first release film tape L1, thereby forming the handle portion 311 of the first release film layer. The outline cut by the second closed blade is 0.1mm~0.5mm larger than the outline cut by the first closed blade on the second circular die-cutting roller group, that is, it does not cut the block foam. Then, the waste material outside the frame outside the closed contour line is removed from the top, including the waste material of the first transition release film strip G11, the waste material of the second double-sided adhesive strip J22, the waste material of the first double-sided adhesive strip J12, and the waste material of the first release film strip L11. The waste material of the third bottom support film strip T31, the waste material inside the clearance hole, and the waste material inside the assembly positioning hole are removed from the bottom. Then, the waste material of the first transition release film strip G12 inside the closed contour line is removed through the waste removal tape P1. Then, the first bottom support film strip T1 below is removed. At this time, the composite strips from bottom to top are: finished protective film strip B1, first release film layer 31, first double-sided adhesive layer 21, foam layer 1, and second double-sided adhesive layer 22. Step d: After step c, the second release film strip L2 is laminated on top of the second double-sided adhesive layer 22 of the composite strip, and the fourth support film strip T4 is laminated below. Then, the fourth die-cutting is performed by the fourth circular die-cutting roller group M4. The fourth die-cutting enters from above the strip and cuts out the overlapping outline of the second release film layer and the outline of the finished protective film layer M401. The outline of the second release film layer and the outline of the finished protective film layer completely surround the outline of the first release film layer 31. At the same time, the fourth positioning mark line M402 is also cut out. Then, the waste material L21 of the second release film strip and the waste material C11 of the finished protective film strip are removed except for the outline of the second release film layer and the outline of the finished protective film layer M401. Finally, the release paper G2 is laminated from above the strip and the strip is wound up. Before winding, the bottom fourth support film strip T4 is removed.

[0009] Furthermore, the first circular die-cutting roller group M1 is provided with a handle and a break line blade R101 corresponding to the handle outline and break line. Figure 4-1 The yellow line in the middle), and the first positioning mark line blade R102 corresponding to the first positioning mark line (in this embodiment, the first circular die-cutting roller group M1 is provided with three sets of handles and break line blades R101, and three first positioning mark line blades R102, that is Figure 4-1(Middle purple line); The second circular die-cutting roller group M2 has a first closed blade R201 corresponding to the outline of the foam layer M201 on the cutter roller ( Figure 4-2 (Red circle in the middle), and has a corresponding second positioning mark line for the blade R202 ( Figure 4-2 (marked with a red right angle); the first closed blade R201 is circular, and there are also 3 sets; the third circular die-cutting roller group M3 has a second closed blade R301 corresponding to the outline of the second release film layer ( Figure 4-3 The second closed blade R301 has a low-cutting-edge section R302 (i.e., the shorter red arc in 4-3) with a reduced blade height, and the reduction value is equivalent to the thickness of the first release film layer 31; the shape of this low-cutting-edge section R302 is similar to the shape of the opening of the outline M101 of the first release film layer handle, and its die-cutting depth is just enough to cut through the first double-sided adhesive tape J1, but not through the first release film tape L1, while the remaining sections just cut through the first release film. L1 is included, thereby forming the handle portion of the first release film layer; the contour line cut by the second closed blade R301 is 0.1mm~0.5mm wider than the contour line cut by the first closed blade R201 on the second circular die-cutting roller group M2, that is, it does not cut the block foam, and the unfolded diagrams of the two are concentrically arranged; the fourth circular die-cutting roller group M4 is provided with a frame-shaped closed blade R401 corresponding to the contour line of the outer frame of the second release film layer and the contour line of the outer frame of the finished protective film layer ( Figure 4-4 (Blue border).

[0010] The present invention, through the above-described structure and process, has the following main advantages: Firstly, the components adopt a "foam shrinkage" structure and process, which makes the double-sided adhesive layer and foam form an edge-wrapping structure, solving the problems of tearing and delamination caused by customers during use, and making it unusable for customers, thereby improving the customer's installation yield. The customer's usage yield can be increased from 30% to 98%, while reducing the cost of production materials. Secondly, the production of circular die-cutting replaces the traditional flat die-cutting process, which greatly improves both production capacity and efficiency. Furthermore, when rewinding after shrinking, adjacent products can be rewound without gaps, thereby increasing the utilization rate of the rewound material and effectively reducing production costs. For example, if the 2mm gap is eliminated, 60m of material can be saved when producing 30,000 of these components.

[0011] The above embodiments are merely exemplary implementations used to illustrate the principles of the present invention; however, the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A tear-resistant, delaminated double-sided adhesive foam assembly, comprising a foam layer and a first double-sided adhesive layer and a second double-sided adhesive layer respectively laminated on both sides of the foam layer, wherein a first release film layer is laminated on the outer surface of the first double-sided adhesive layer, and the first release film layer has a handle portion protruding from the first double-sided adhesive layer, characterized in that: The first release film layer also has a break line connected to the outline of the handle; a finished protective film is laminated on the outer surface of the first release film layer, and a second release film layer is laminated on the outer surface of the second double-sided adhesive layer; the double-sided adhesive foam assembly is also provided with several clearance holes that simultaneously penetrate the second double-sided adhesive layer, the foam layer, the first double-sided adhesive layer, the first release film layer, and the finished protective film; the finished protective film completely covers the first release film layer, and assembly positioning holes are also provided at the four corners of the finished protective film; the second release film layer has the same outline as the finished protective film and completely covers the second double-sided adhesive layer; the outline of the foam layer is recessed by 0.1mm to 0.5mm relative to the outlines of the first and second double-sided adhesive layers.

2. The tear-resistant, delaminated double-sided adhesive foam assembly according to claim 1, characterized in that: The outline of the foam layer is 0.2 mm inward relative to the outlines of the first and second double-sided adhesive layers.

3. The production process of the tear-resistant double-sided adhesive foam assembly as described in claim 1, carried out via a high-speed rotary die-cutting production line, characterized in that: The production process includes the following steps: Step a: The finished protective film strip and the first release film strip are sequentially laminated onto the first base film strip. The first die-cutting is performed by the first circular die-cutting roller group. The first die-cutting is performed from above the strip. The handle outline that just cuts through the first release film strip and the break line connected to it are die-cut on the first release film strip. The first positioning mark line that cuts through the first release film strip and the finished protective film strip is also die-cut. Step b: A first double-sided adhesive tape is laminated onto the composite main material tape after the first die-cutting, and then the film on the first double-sided adhesive tape is peeled off. At the same time, in the opposite direction of the main material tape's movement, a foam tape is laminated onto the second bottom film tape after removing its own film, and then a second die-cutting is performed by the second circular die-cutting roller group. The second die-cutting enters from above the material tape and cuts out a complete outline of the foam layer on the foam tape, just cutting through the foam tape. At the same time, a second positioning mark line is formed on the second bottom film tape. Then, the waste foam tape outside the outline of the foam layer is removed, and the block foam attached to the second bottom film tape is flipped over by the first flipping roller group and laminated with the first double-sided adhesive tape on the main material tape. The second bottom film tape is then removed from above, forming the following from bottom to top: first bottom film tape, first release film tape with handle outline and break line, first double-sided adhesive tape, and formed foam layer. Step c: After step b, a second double-sided adhesive tape is laminated on top of the composite tape, and the film on the second double-sided adhesive tape is removed. Then, a first transition release film tape is laminated on top, and a third support film tape is laminated on the lower surface of the main tape. Then, a third die-cutting is performed by the third circular die-cutting roller group. The third die-cutting enters from above the tape and cuts out the complete outline of the second double-sided adhesive layer, the complete outline of the first double-sided adhesive layer, and the remaining outline of the first release film layer that just cuts through the first release film tape. The remaining outline of the first release film is connected to the handle part outline formed by the first die-cutting. The first release film layer complete outline is directly formed; and the second double-sided adhesive layer complete outline and the first double-sided adhesive layer complete outline are 0.1mm~0.5mm outward relative to the foam layer outline; the third die-cutting also cuts out the clearance hole outline and assembly positioning hole outline that penetrate the first transition release film strip, the second double-sided adhesive strip, the block foam, the first double-sided adhesive strip, the first release film strip, the finished protective film strip, and the first support film strip on the composite strip; and also cuts out two third positioning mark lines that correspond to the first positioning mark line and the second positioning mark line respectively; Then, the waste material outside the frame outside the closed contour line is removed from the top, including the waste material of the first transition release film strip, the waste material of the second double-sided adhesive strip, the waste material of the first double-sided adhesive strip, and the waste material of the first release film strip. The waste material of the third bottom support film strip, the waste material inside the clearance hole, and the waste material inside the assembly positioning hole are removed from the bottom. Then, the waste material of the first transition release film inside the closed contour line is removed by the waste removal tape. Then, the first bottom support film strip below is removed. At this time, the composite material strips from bottom to top are: finished protective film strip, first release film layer, first double-sided adhesive layer, foam layer, and second double-sided adhesive layer. Step d: After step c, a second release film strip is laminated on top of the second double-sided adhesive layer of the composite strip, and a fourth support film strip is laminated below. Then, a fourth die-cutting is performed by the fourth circular die-cutting roller group. The fourth die-cutting enters from above the strip and cuts out the overlapping outline of the second release film layer and the outline of the finished protective film layer. The outline of the second release film layer and the outline of the finished protective film layer completely surround the outline of the first release film layer. At the same time, a fourth positioning mark line is also cut out. Then, the waste of the second release film strip and the waste of the finished protective film strip are removed from the outline of the second release film layer and the outline of the finished protective film layer. Finally, the release paper is laminated from above the strip and the strip is wound up, and the fourth support film strip at the bottom is removed before winding.

4. The manufacturing process of the tear-resistant delamination double-sided adhesive foam assembly according to claim 3, characterized in that: The first circular die-cutting roller assembly has a handle and a break line blade corresponding to the outline of the handle and the break line, and a first positioning mark line blade corresponding to the first positioning mark line.

5. The manufacturing process of the tear-resistant delamination double-sided adhesive foam assembly according to claim 3, characterized in that: The second circular die-cutting roller group has a first closed blade corresponding to the outline of the foam layer, and a corresponding second positioning mark blade; the first closed blade is circular, and there are also 3 sets.

6. The manufacturing process of the tear-resistant delamination double-sided adhesive foam assembly according to claim 3, characterized in that: The third circular die-cutting roller assembly has a second closed blade corresponding to the outline of the second release film layer. The second closed blade has a low blade section with a reduced blade height, and the reduction value is equivalent to the thickness of the first release film layer. The shape of the low blade section is similar to the shape of the opening of the outline of the handle portion of the first release film layer. Its die-cutting depth is just enough to cut through the first double-sided adhesive tape, but not through the first release film tape, while the remaining section just cuts through the first release film tape, thereby forming the handle portion of the first release film layer. The outline cut by the second closed blade is 0.1mm~0.5mm larger than the outline cut by the first closed blade on the second circular die-cutting roller assembly, that is, it does not cut the block foam, and the unfolded diagrams of the two are concentrically arranged.

7. The manufacturing process of the tear-resistant delamination double-sided adhesive foam assembly according to claim 3, characterized in that: The fourth circular die-cutting roller group is provided with a frame-shaped closed blade corresponding to the outline of the outer frame of the second release film layer and the outline of the outer frame of the finished protective film layer.

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