A protective layer structure

Abstract

The present invention discloses a protective layer structure, which relates to the field of die-cutting technology and comprises a protective layer body, a reverse sticking layer and a product layer, wherein the reverse sticking layer is divided into a first reverse sticking layer and a second reverse sticking layer with different shapes; the protective layer structure is further provided with a peeling starting position at a corner, the product layer close to the peeling starting position uses the first reverse sticking layer, and the product layer far from the peeling starting position uses the second reverse sticking layer. When the protective film is just beginning to be peeled off, since the position available for gripping is small, the peeling angle is generally small, resulting in a large peeling force required for peeling off the protective film, which makes peeling difficult. Therefore, it is necessary to add a reverse sticking layer with a special shape between the protective layer and the product layer to reduce the peeling difficulty. In the middle of the peeling process, since the area of the protective film available for gripping and the operating space increase, the peeling angle can be increased, the peeling force required for peeling off the protective film becomes smaller, and a reverse sticking layer with a conventional shape can be used, thereby reducing the mold manufacturing cost.

Description

Technical Field

[0001] The invention relates to the field of die-cutting technology, in particular to a protective layer structure. Background Art

[0002] Many consumer electronic products have numerous components and complex structures. During the assembly process, process components are required to improve the accuracy and efficiency of product assembly. For example, a peelable adhesive protective layer is covered on certain die-cut products to protect the product before installation. However, due to various factors during the production and transportation process, it is sometimes difficult to peel off the protective layer, and the product itself may even be damaged. Therefore, it is necessary to add a reverse adhesive layer between the product and the protective layer, as shown in the patents CN109572085A and CN109572084A.

[0003] In the above patent solution, from the starting position to the end position of peeling, as the peeling angle of the protective film continues to increase, the peeling force exerted on the protective film continues to change (the peeling force gradually changes from large to small). Using a single special-shaped reverse sticking layer will cause the special-shaped reverse sticking layer closer to the end position of peeling to have the same effect as the conventional-shaped reverse sticking layer, thereby causing waste. For this reason, technicians in this field have proposed a protective layer structure. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a protective layer structure that solves the problems raised by the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a protective layer structure, including a protective layer body, a reverse layer, and a product layer, wherein:

[0006] The reverse sticking layer and the product layer are both provided with a plurality of corresponding numbers;

[0007] One side of the protective layer body is sticky, and the protective layer body is bonded to the reverse sticking layer having the same sticky side through the sticky property;

[0008] A portion of the product layer is superimposed on the reverse sticking layer, and a portion is superimposed on the protective layer body, wherein the portion superimposed on the reverse sticking layer is not sticky, and the portion superimposed on the protective layer body is sticky;

[0009] The anti-sticking layer is divided into a first anti-sticking layer and a second anti-sticking layer with different shapes;

[0010] The protective layer structure is provided with a peeling starting position. The product layer close to the peeling starting position uses the first reverse layer, and the product layer far from the peeling starting position uses the second reverse layer.

[0011] Furthermore, the area of the second reverse layer on the product layer, which is close to the peeling starting position, accounts for 25% to 40% of the surface area of the product layer.

[0012] Furthermore, the width of the first reverse layer on the side close to the peeling starting position is greater than the width on the side away from the peeling starting position.

[0013] Furthermore, the first reverse layer covers the product layer on the side of the starting position of peeling of the protective layer body, and at the same time covers more than half of the circumference of the product layer.

[0014] Furthermore, the first reverse layer has an extension portion that exceeds the contact surface with the product layer.

[0015] Furthermore, one side of the product layer covered by the protective layer body is adhesive, and the reverse layer and the product layer are in contact with each other in a non-adhesive manner.

[0016] Furthermore, one side of the product layer covered by the protective layer body is not sticky, and the reverse layer and the product layer are in sticky contact.

[0017] Furthermore, the corners of the first reverse sticking layer and the second reverse sticking layer are both rounded, and the rounded corner radius R is greater than or equal to 0.25 mm.

[0018] Furthermore, one side of the middle of the reverse layer also has an inclined structure. A straight line a is drawn connecting the starting position of peeling of the protective layer body and the center line of the product layer, and then a perpendicular line b is drawn on a. With a as the Y-axis and b as the X-axis, a straight line c is drawn connecting the endpoints of the two adjacent sides of the inclined structure of the reverse layer. Assuming that the slope of c is k1 and the slope of the extended line d of the inclined structure is k2, then 0≤k2≤k1.

[0019] The present invention provides a protective layer structure. Compared with the prior art, it has the following advantages:

[0020] In this protective layer structure, when the protective film is first peeled off, the position available for gripping is small and the peeling angle is generally small, resulting in a large peeling force required to peel off the protective film, which makes peeling difficult. Therefore, it is necessary to add a reverse layer with a special shape between the protective layer and the product layer to reduce the peeling difficulty. In the middle of the peeling process, since the area of the protective film available for gripping and the operating space increase, the peeling angle can be increased, the peeling force required to peel off the protective film becomes smaller, and a reverse layer with a conventional shape can be used, thereby reducing the mold manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the decomposition structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the superimposed structure of the present invention;

[0023] Figure 3 It is a top view of the present invention in a folded state;

[0024] Figure 4 Schematic diagram of the angle change of the protective layer during the peeling process in the present invention.

[0025] Figure 5 This is a schematic diagram of the starting position for peeling off the auxiliary line corners in the present invention.

[0026] Figure 6 This is a schematic diagram of the starting position for peeling off the side edge of the auxiliary line in the present invention.

[0027] In the figure: 1, protective layer body; 2, reverse sticking layer; 21, first reverse sticking layer; 22, second reverse sticking layer; 3, product layer. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0029] See also Figure 1 、 2 3. The present invention provides a technical solution: a protective layer structure, comprising a protective layer body 1, an anti-sticking layer 2, and a product layer 3, wherein the anti-sticking layer 2 and the product layer 3 are both provided in a plurality and in corresponding quantities, one side of the protective layer body 1 is sticky, and the protective layer body 1 is bonded to the anti-sticking layer 2 which also has a sticky side through the sticky property, a part of the product layer 3 is overlapped on the anti-sticking layer 2, and a part of the product layer 3 is overlapped on the protective layer body 1, the part overlapped with the anti-sticking layer 2 is not sticky, and the part overlapped with the protective layer body 1 is sticky.

[0030] In addition, in this embodiment, the area covered by the second reverse layer 22 on the side close to the peeling starting position on the product layer 3 accounts for 25% to 40% of the surface area of the product layer 3. The width of the first reverse layer 21 on the side close to the peeling starting position is greater than the width on the side away from the peeling starting position. The first reverse layer 21 covers the product layer 3 on the side of the peeling starting position of the protective layer body 1, and at the same time covers more than half of the circumference of the product layer 3. The first reverse layer 21 has an extension portion that exceeds the contact surface with the product layer 3. One side of the product layer 3 covered by the protective layer body 1 is sticky, then the reverse layer 2 and the product layer 3 are in non-sticky surface contact. One side of the product layer 3 covered by the protective layer body 1 is not sticky, then the reverse layer 2 and the product layer 3 are in sticky surface contact. The corners of the contours of the first reverse layer 21 and the second reverse layer 22 are set to be rounded, and the fillet radius R is ≥ 0.25mm. Example

[0031] In summary, please refer to Figure 4 , it can be seen that α<β, so the peeling force of the right half of the schematic diagram is greater, which means that the peeling force of the protective layer is related to its peeling angle. When the protective film is first peeled off, the position available for gripping is small, and the peeling angle is generally small, resulting in a large peeling force required to peel off the protective film, which makes peeling difficult. Therefore, it is necessary to add a reverse sticking layer (first reverse sticking layer 21) with a special shape between the protective layer and the product layer to reduce the peeling difficulty. In the middle of the peeling process, due to the increase in the area of the protective film available for gripping and the operating space, the peeling angle can be increased, and the peeling force required to peel off the protective film becomes smaller. A reverse sticking layer (second reverse sticking layer 22) with a conventional shape can be used, thereby reducing the mold manufacturing cost.

[0032] See also Figure 5 、 6 , the middle side of the reverse sticking layer 2 also has an inclined structure, connect the peeling starting position of the protective layer body 1 and the center line of the product layer 3 to make a straight line a, then make a perpendicular line b on a, with a as the Y axis and b as the X axis, connect the endpoints of the two adjacent sides of the inclined structure of the reverse sticking layer 2 to make a straight line c, assuming that the slope of c is k1, and the slope of the extended line d of the inclined structure is k2, then 0≤k2≤k1;

[0033] In addition, the reverse sticking layer 2 is divided into a first reverse sticking layer 21 and a second reverse sticking layer 22 of different shapes. The protective layer structure is further provided with a peeling starting position at the corner. The product layer 3 close to the peeling starting position uses the first reverse sticking layer 21, and the product layer 3 away from the peeling starting position uses the second reverse sticking layer 22. It can also be understood that Figure 5 、 6 When the stripping is performed along the direction of the straight line a, the shape of the anti-sticking layer near the first anti-sticking layer 21 is just beginning to be stripped, because the stripping angle is small (such as Figure 4 α in the figure), which causes the peeling force required to peel off the protective film to be large, resulting in peeling difficulty. Therefore, a first reverse layer 21 with a special shape is required to reduce the peeling difficulty. Similarly, at the end of the peeling, the shape of the adjacent reverse layer is the second reverse layer 22. At the end of the peeling, the peeling angle becomes larger (such as Figure 4 β in the figure), if the first reverse layer 21 is redistributed, since the production cost of the first reverse layer 21 is relatively high and the second reverse layer 22 of a normal shape can cope with it, there is no need to continue using the first reverse layer 21, thereby reducing costs.

Claims

1. A protective layer structure, characterized in that: It comprises a protective layer body (1), a back-sticking layer (2), and a product layer (3), wherein: The reverse sticking layer (2) and the product layer (3) are both provided with a plurality of corresponding ones; One side of the protective layer body (1) is sticky, and the protective layer body (1) is bonded to the reverse sticking layer (2) having the same sticky side through the sticky property; A portion of the product layer (3) is superimposed on the reverse layer (2), and a portion is superimposed on the protective layer body (1); the portion superimposed on the reverse layer (2) is not sticky, and the portion superimposed on the protective layer body (1) is sticky; The reverse sticking layer (2) is divided into a first reverse sticking layer (21) and a second reverse sticking layer (22) having different shapes; The protective layer structure is provided with a peeling starting position, the product layer (3) close to the peeling starting position uses the first reverse layer (21), and the product layer (3) away from the peeling starting position uses the second reverse layer (22); The first reverse layer (21) is in a stepped shape, and the second reverse layer (22) is in a rectangular shape; The width of the first reverse layer (21) on the side close to the peeling starting position is greater than the width on the side away from the peeling starting position.

2. A protective layer structure according to claim 1, characterized in that: The area of the second reverse layer (22) covering the product layer (3) on the side close to the peeling starting position accounts for 25% to 40% of the surface area of the product layer (3).

3. The protective layer structure according to claim 1, characterized in that: The first reverse layer (21) covers the product layer (3) on the side of the peeling starting position of the protective layer body (1), and at the same time covers more than half of the circumference of the product layer (3).

4. The protective layer structure according to claim 1, characterized in that: The first counter-sticking layer (21) has an extension portion that exceeds the contact surface with the product layer (3).

5. The protective layer structure according to claim 1, characterized in that: One side of the product layer (3) covered by the protective layer body (1) is adhesive, and the reverse layer (2) and the product layer (3) are in contact with each other on a non-adhesive surface.

6. The protective layer structure according to claim 2, characterized in that: One side of the product layer (3) covered by the protective layer body (1) is non-sticky, and the reverse layer (2) and the product layer (3) are in contact with each other through sticky surfaces.

7. The protective layer structure according to claim 1, characterized in that: The corners of the first reverse sticking layer (21) and the second reverse sticking layer (22) are both rounded, with a rounded corner radius R ≥ 0.25 mm.

8. The protective layer structure according to claim 1, characterized in that: The middle side of the reverse sticking layer (2) also has an inclined structure. A straight line a is drawn connecting the peeling starting position of the protective layer body (1) and the center line of the product layer (3). Then, a perpendicular line b is drawn on a. With a as the Y axis and b as the X axis, a straight line c is drawn connecting the endpoints of the two adjacent sides of the inclined structure of the reverse sticking layer (2). Assuming that the slope of c is k1 and the slope of the extended line d of the inclined structure is k2, then 0≤k2≤k1.

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