Anti-bonding packaging adhesive film and preparation device thereof

Abstract

The utility model discloses an anti-bonding packaging adhesive film which comprises an adhesive film body, and the back surface of the adhesive film body is provided with raised lines which can form a gap between the laminated adhesive film bodies. According to the utility model, the raised grains are arranged on the surface of the adhesive film body, so that gaps are generated among the layers due to raised grains in the curling process of the adhesive film, and the adhesive films of adjacent layers are prevented from being completely attached, so that the contact area in the curling process of the adhesive film can be reduced, and the aim of reducing the adhesion of the adhesive film is fulfilled. The utility model further discloses a preparation device of the anti-bonding packaging adhesive film, the preparation device comprises a cloth-based embossing belt and an extrusion roller set, and further comprises a plurality of cooling rollers and turning rollers, the cloth-based embossing belt is installed on the cooling rollers and the turning rollers in a tensioning mode, and mother set patterns forming mirror images with the convex patterns are arranged on the cloth-based embossing belt. The cloth-based embossing belt is provided with the master pattern which forms a mirror image with the raised pattern, and the wear-resistant cloth-based embossing belt is used for replacing a conventional rubber roller, so that the service life is longer, and the maintenance workload can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic product manufacturing materials, and more specifically, it relates to an anti-adhesion encapsulation film and its preparation device. Background Technology

[0002] With the continuous development of the photovoltaic industry, the price of photovoltaic modules has continued to decline. Due to cost considerations, photovoltaic module factories are constantly optimizing manpower at the encapsulation film cutting end. To ensure a normal supply of materials for the cutting end even after manpower optimization, photovoltaic module factories are requiring encapsulation film material suppliers to continuously increase the length of encapsulation film per roll to reduce roll change frequency. Currently, the length of encapsulation film per roll has increased from 150 meters / roll to 350-400 meters / roll, and further increases are expected in the future. Encapsulation film itself has a low melting point, typically starting to melt at 65-73℃. Under high-temperature transportation conditions or due to increased pressure at the bottom of the roll after increasing the roll diameter, the film is prone to sticking together, making it difficult to tear after being cut by the cutting machine. To ensure the smooth implementation of new processes under the new circumstances, the problem of easy sticking of large-diameter encapsulation film rolls must be solved. The invention patent with announcement number CN118813161A discloses a photovoltaic encapsulation film with high adhesion, its preparation method and application. However, this invention aims to improve the bonding strength between the photovoltaic encapsulation film and glass, but it cannot solve the problem of film adhesion after the roll diameter of the photovoltaic encapsulation film increases, which affects the efficiency of subsequent cutting operations. Utility Model Content

[0003] When the diameter of the encapsulating film roll increases, the film tends to stick together, affecting the efficiency of subsequent cutting operations. To overcome this defect, this utility model provides an anti-adhesion encapsulating film to effectively prevent the film from sticking together when the diameter of the encapsulating film roll increases, thereby ensuring that the efficiency of subsequent cutting operations is not affected. This utility model also provides an apparatus for preparing the anti-adhesion encapsulating film.

[0004] The technical solution of this utility model is: an anti-adhesion encapsulating film, comprising a film body, the back of which is provided with raised textures that create gaps between stacked film bodies. This utility model, by setting raised textures on the surface of the film body, creates gaps between layers of the film during the rolling process due to the raised textures, preventing adjacent layers from fully adhering. This reduces the contact area during film rolling, thereby reducing film adhesion.

[0005] Preferably, the ridges include raised ridges evenly distributed parallel to each other on the surface of the adhesive film body, and the adhesive film body is wavy, having crests and troughs. The ridges make the surface of the adhesive film body uneven, which can reduce the contact area during the film rolling process and achieve the effect of preventing the film from sticking together.

[0006] Preferably, the raised texture on the front side of the adhesive film also includes an array of evenly distributed raised dots located within the troughs. These raised dots, combined with the ridges, enhance the fragmentation of the interlayer contact surfaces of the adhesive film, thus better preventing film adhesion.

[0007] Preferably, the apex of the bump is at the same height as the apex of the crest. The apex of the bump and the apex of the crest are in contact with the film body of the adjacent layer. The fact that the apex of the bump and the apex of the crest are at the same height ensures the overall flatness of the film layer.

[0008] Preferably, the protrusion is spherical. The spherical protrusion structure is stable and has strong load-bearing capacity.

[0009] Alternatively, the protrusion can be shaped like a regular square frustum. The square frustum-shaped protrusion structure is stable and has strong load-bearing capacity.

[0010] The apparatus for preparing the anti-adhesion encapsulating film includes an embossed belt and an extrusion roller assembly, as well as several cooling rollers and guide rollers. The embossed belt is tensioned and mounted on the cooling rollers and guide rollers. The embossed belt has a master pattern mirrored in the raised pattern. In the traditional process, molten fluid extruded from a die passes through the gap between a steel roller and a rubber roller. The rubber roller has a master pattern processed on it. Cooling water circulates inside both the steel roller and the rubber roller. The molten fluid is cooled and solidified during the extrusion process by the steel roller and the rubber roller, forming an adhesive film and simultaneously completing the embossing and shaping. Afterward, it is cooled step-by-step by a series of cooling rollers before being slit and wound up. During prolonged use, the surface of the rubber roller gradually wears down, causing the master pattern to become increasingly flat, and the generated raised patterns to become correspondingly lower and thinner, thus increasing the risk of adhesive film adhesion. In this case, replacing the rubber roller with a more wear-resistant embossed belt results in a longer service life.

[0011] Preferably, the embossed tape includes a base fabric and a detachable embossing master piece, with the master piece covering the base fabric. This invention designs the embossed tape as a split structure, combining the base fabric and the detachable embossing master piece. This replaces the method of directly engraving the master pattern onto the surface of the embossed tape. Embossing is achieved through the embossing master piece. If the master pattern wears out, only the embossing master piece needs to be replaced, while the more cumbersome base fabric can be retained. Replacement is convenient and production costs are lower, greatly facilitating timely updates and maintenance of the master pattern and reducing production costs.

[0012] The beneficial effects of this utility model are:

[0013] This invention effectively prevents adhesive film from sticking together as the roll diameter of the encapsulating film increases. The raised texture created during the manufacturing process generates gaps between the layers of the film during the rolling process, reducing the contact area between the layers and thus effectively preventing adhesion.

[0014] The preparation device is easier to maintain. This invention uses a more wear-resistant fabric-based embossed belt instead of a conventional rubber roller, resulting in a longer service life and reduced maintenance workload. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the adhesive film body in the wound state in this utility model.

[0016] Figure 2 This is a schematic diagram of the working state of the apparatus for preparing the anti-adhesion encapsulating film in this utility model.

[0017] Figure 3 This is a schematic diagram of another structure of the adhesive film body in the wound state in this utility model.

[0018] Figure 4 This is a schematic diagram of another partial working state of the apparatus for preparing the anti-adhesion encapsulating film in this utility model.

[0019] In the figure, 1-film body, 2-ridge line, 3-protrusion, 4-fabric embossing belt, 5-extrusion roller group, 6-embossing master plate, 7-base fabric, 8-cooling roller, 9-direction roller, 10-extrusion die. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1:

[0022] An anti-adhesion encapsulation film includes a film body 1, with raised textures on both the front and back sides of the film body 1. The raised textures create gaps between the layers of the wound film body 1. The raised textures are a mesh pattern.

[0023] like Figure 2As shown, the apparatus for preparing the anti-adhesive encapsulating film includes an embossing unit consisting of a fabric embossing belt 4 and an extrusion roller group 5; an extrusion die 10 located upstream of the embossing unit; a pre-cooling unit, a thickness measuring unit, and a post-cooling unit arranged sequentially downstream of the embossing unit. The pre-cooling unit contains four cooling rollers 8 with internally circulating coolant; the thickness measuring unit contains two guide rollers 9 and a thickness gauge; the post-cooling unit contains three cooling rollers 8 with internally circulating coolant; two guide rollers 9 are located upstream of the extrusion die 10; and a cooling roller 8 is located between the extrusion die 10 and the extrusion roller group 5. The fabric embossing belt 4 is a closed flexible loop, supported by the guide rollers 9 and the cooling rollers 8 before the thickness measuring unit, and tensioned and wound around the path formed by these cooling rollers 8 and guide rollers 9. The cooling rollers 8 are driven by a drive mechanism consisting of a motor and a transmission chain to rotate, providing the moving power for the fabric embossing belt 4. The extrusion roller assembly 5 includes a positive pressure roller and a back pressure roller. The positive pressure roller is a steel roller, and the back pressure roller is a rubber roller. The positive and back pressure rollers roll against each other. A fabric embossed tape 4 passes between the positive and back pressure rollers. Both the positive and back pressure rollers are hollow structures with coolant circulating inside to maintain a low surface temperature. The fabric embossed tape 4 is made of fabric, and the warp and weft threads on it interweave to form a grid-like raised line. The unevenness on the surface of the fabric embossed tape 4 created by the raised line forms the master pattern. The surface of the fabric embossed tape 4 is also coated with a Teflon coating. The surface of the positive pressure roller of the extrusion roller assembly 5 is also processed with a grid-like raised line to form the raised pattern on the front side of the adhesive film body 1.

[0024] The manufacturing process of this anti-adhesion encapsulating film is similar to that of traditional cast film production. Semi-finished resin particles with formulated additives are fed into an extruder for melting, plasticizing, and thorough mixing. The mixture is then extruded through an extrusion die 10 via a screw extruder, resulting in a high-temperature molten sheet-like flowing colloid. The molten flowing colloid flowing from the extrusion die 10 is cast and adhered to the surface of the fabric embossing belt 4, and then enters the gap between the extrusion roller group 5. It is then extruded into a thinner sheet by the extrusion roller group 5, and simultaneously rapidly cooled and solidified into a film under the cooling effect of the extrusion roller group 5 surface. During the extrusion by the extrusion roller group 5, the master pattern and the raised lines on the surface of the positive pressure roller are imprinted onto the film during the cooling and solidification process. The pattern of the master pattern is transferred to the film, ultimately completing the embossing and shaping on the back of the formed film, generating a mirrored raised pattern. Simultaneously, the pattern on the positive pressure roller is also transferred to the front of the film. Then, the fabric embossed belt 4, carrying the adhesive film, continues to cool in the pre-cooling unit. When it reaches the guide roller 9 of the thickness measuring unit, the adhesive film peels off from the fabric embossed belt 4. The adhesion between the Teflon coating and the now cooled adhesive film is greatly reduced, ensuring smooth peeling. The peeled adhesive film is first tested for thickness by a thickness gauge, then further cooled to near room temperature in the post-cooling unit, and finally output from the preparation device for subsequent slitting and winding. The fabric embossed belt 4, with the adhesive film peeled off, turns from the guide roller 9 of the thickness measuring unit and returns to the extrusion die 10, thus repeating the cycle.

[0025] Example 2:

[0026] like Figure 1 As shown, an anti-adhesion encapsulation film includes a film body 1. The film body 1 has raised textures on both sides, which create gaps between the layers of the wound film body 1. The raised textures are linear, including ridges 2. The ridges 2 are evenly distributed parallel to each other on the surface of the film body 1. Both the front and back sides of the film body 1 have ridges 2, giving the film body 1 a wavy shape with crests and troughs.

[0027] like Figure 4 As shown, the apparatus for preparing the anti-adhesive encapsulating film includes an embossing unit consisting of a fabric embossing belt 4 and an extrusion roller group 5; an extrusion die 10 located upstream of the embossing unit; a pre-cooling unit, a thickness measuring unit, and a post-cooling unit arranged sequentially downstream of the embossing unit. The pre-cooling unit contains four cooling rollers 8 with internally circulating coolant; the thickness measuring unit contains two guide rollers 9 and a thickness gauge; the post-cooling unit contains three cooling rollers 8 with internally circulating coolant; two guide rollers 9 are located upstream of the extrusion die 10; and a cooling roller 8 is located between the extrusion die 10 and the extrusion roller group 5. The fabric embossing belt 4 is a closed flexible loop, supported by the guide rollers 9 and the cooling rollers 8 before the thickness measuring unit, and tensioned and wound around the path formed by these cooling rollers 8 and guide rollers 9. The cooling rollers 8 are driven by a drive mechanism consisting of a motor and a transmission chain to rotate, providing the moving power for the fabric embossing belt 4. The extrusion roller assembly 5 includes a positive pressure roller and a back pressure roller. The positive pressure roller is a steel roller, and the back pressure roller is a rubber roller. The positive pressure roller and the back pressure roller roll against each other. The fabric-based embossed tape 4 passes between the positive pressure roller and the back pressure roller. Both the positive pressure roller and the back pressure roller have hollow structures and are filled with cooling liquid to keep their surfaces at a low temperature. Unlike Embodiment 1, in this embodiment, the fabric-based embossed tape 4 includes a base fabric 7 and a removable embossing master 6. The embossing master 6 is also made of fabric and is attached to and covered on the base fabric 7. The threads on the embossing master 6 are woven to form regularly parallel and evenly distributed raised lines. The unevenness on the surface of the embossing master 6 created by the raised lines constitutes the master pattern. The surface of the embossing master 6 is also coated with a Teflon coating. The surface of the positive pressure roller of the extrusion roller assembly 5 is also processed with raised lines to form the ridge lines 2 on the front side of the adhesive film body 1. The rest is the same as in Embodiment 1.

[0028] The manufacturing process of this anti-adhesion encapsulating film is similar to that of traditional cast film production. Semi-finished resin particles with formulated additives are fed into an extruder for melting, plasticizing, and thorough mixing. The mixture is then extruded through an extrusion die 10 via a screw extruder, resulting in a high-temperature molten sheet-like flowing colloid. The molten flowing colloid flowing from the extrusion die 10 is cast and adhered to the surface of the fabric embossing belt 4, and then enters the gap between the extrusion roller group 5. It is then extruded into a thinner sheet by the extrusion roller group 5, and simultaneously rapidly cooled and solidified into a film under the cooling effect of the extrusion roller group 5 surface. During the extrusion by the extrusion roller group 5, the master pattern and the raised lines on the surface of the positive pressure roller are imprinted onto the film during the cooling and solidification process. The pattern of the master pattern is transferred to the film, ultimately completing the embossing and shaping on the back of the formed film, generating a mirrored raised pattern. Simultaneously, the pattern on the positive pressure roller is also transferred to the front of the film. Then, the fabric embossed belt 4, carrying the adhesive film, continues to cool in the pre-cooling unit. When it reaches the guide roller 9 of the thickness measuring unit, the adhesive film peels off from the fabric embossed belt 4. The adhesion between the Teflon coating and the now cooled adhesive film is greatly reduced, ensuring smooth peeling. The peeled adhesive film is first tested for thickness by a thickness gauge, then further cooled to near room temperature in the post-cooling unit, and finally output from the preparation device for subsequent slitting and winding. The fabric embossed belt 4, with the adhesive film peeled off, turns from the guide roller 9 of the thickness measuring unit and returns to the extrusion die 10, thus repeating the cycle.

[0029] Example 3:

[0030] like Figure 3 As shown, an anti-adhesion encapsulating film includes a film body 1. The film body 1 has raised textures on both sides, which create gaps between the layers of the wound film body 1. Unlike Embodiment 1, in this embodiment, the raised textures on the front side of the film body 1 are a mixture of linear and dotted textures, including ridges 2 and dispersed raised dots 3. The ridges 2 are evenly distributed parallel to each other on both sides of the film body 1, giving the film body 1 a wavy shape with crests and troughs. The raised dots 3 are evenly distributed in an array and located within the troughs, with each raised dot corresponding to a trough. The apex of each raised dot 3 is at the same height as the apex of a crest. The protrusion 3 is spherical, and the bottom diameter of the protrusion 3 is greater than the bottom width of the crest. This ensures that when the film body 1 is wound and stacked, the crest on the reverse side of the outer film body 1 will not be able to be embedded in the trough on the front side of the inner film body 1 due to the obstruction of the protrusion 3 on the front side of the inner film body 1, thereby more effectively preventing the film from sticking together.

[0031] The apparatus for preparing the anti-adhesive encapsulating film includes an embossing unit consisting of a fabric embossed belt 4 and an extrusion roller group 5; an extrusion die 10 located upstream of the embossing unit; a pre-cooling unit, a thickness measuring unit, and a post-cooling unit arranged sequentially downstream of the embossing unit. The pre-cooling unit contains four cooling rollers 8 with internally circulating coolant; the thickness measuring unit contains two guide rollers 9 and a thickness gauge; the post-cooling unit contains three cooling rollers 8 with internally circulating coolant; two guide rollers 9 are located upstream of the extrusion die 10; and a cooling roller 8 is located between the extrusion die 10 and the extrusion roller group 5. The fabric embossed belt 4 is a closed flexible loop, supported by the guide rollers 9 and the cooling rollers 8 before the thickness measuring unit, and tensioned and wound around the path formed by these cooling rollers 8 and guide rollers 9. The cooling rollers 8 are driven by a drive mechanism consisting of a motor and a transmission chain to rotate, providing the moving power for the fabric embossed belt 4. The extrusion roller assembly 5 includes a positive pressure roller and a back pressure roller. The positive pressure roller is a steel roller, and the back pressure roller is a rubber roller. The positive pressure roller and the back pressure roller roll against each other. The fabric-based embossed tape 4 passes between the positive pressure roller and the back pressure roller. Both the positive pressure roller and the back pressure roller are hollow structures with coolant circulating inside to keep their surfaces at a low temperature. Unlike Embodiment 1, in this embodiment, the fabric-based embossed tape 4 includes a base fabric 7 and a removable embossing master 6. The embossing master 6 is also made of fabric and is attached to and covered on the base fabric 7. The threads on the embossing master 6 are woven to form regularly parallel and evenly distributed raised lines. The unevenness on the surface of the embossing master 6 created by the raised lines constitutes the master pattern. The surface of the embossing master 6 is also coated with a Teflon coating. The surface of the positive pressure roller of the extrusion roller assembly 5 is also processed with raised lines and pits to form the ridges 2 and raised dots 3 on the front side of the adhesive film body 1. The rest is the same as in Embodiment 1.

[0032] The manufacturing process of this anti-adhesion encapsulating film is similar to that of traditional cast film production. Semi-finished resin particles with formulated additives are fed into an extruder for melting, plasticizing, and thorough mixing. The mixture is then extruded through an extrusion die 10 via a screw extruder, resulting in a high-temperature molten sheet-like flowing colloid. The molten flowing colloid flowing from the extrusion die 10 is cast and adhered to the surface of the fabric embossing belt 4, and then enters the gap between the extrusion roller group 5. It is then extruded into a thinner sheet by the extrusion roller group 5, and simultaneously rapidly cooled and solidified into a film under the cooling effect of the extrusion roller group 5 surface. During the extrusion by the extrusion roller group 5, the master pattern and the raised lines on the surface of the positive pressure roller are imprinted onto the film during the cooling and solidification process. The pattern of the master pattern is transferred to the film, ultimately completing the embossing and shaping on the back of the formed film, generating a mirrored raised pattern. Simultaneously, the pattern on the positive pressure roller is also transferred to the front of the film. Then, the fabric embossed belt 4, carrying the adhesive film, continues to cool in the pre-cooling unit. When it reaches the guide roller 9 of the thickness measuring unit, the adhesive film peels off from the fabric embossed belt 4. The adhesion between the Teflon coating and the now cooled adhesive film is greatly reduced, ensuring smooth peeling. The peeled adhesive film is first tested for thickness by a thickness gauge, then further cooled to near room temperature in the post-cooling unit, and finally output from the preparation device for subsequent slitting and winding. The fabric embossed belt 4, with the adhesive film peeled off, turns from the guide roller 9 of the thickness measuring unit and returns to the extrusion die 10, thus repeating the cycle.

[0033] Example 4:

[0034] An anti-adhesion encapsulating film includes a film body 1. The film body 1 has raised textures on both sides, which create gaps between the layers of the wound film body 1. Unlike Embodiment 1, in this embodiment, the raised textures on the front side of the film body 1 are a mixture of linear and dotted textures, including ridges 2 and dispersed raised dots 3. The ridges 2 are evenly distributed parallel to each other on both sides of the film body 1, giving the film body 1 a wavy shape with crests and troughs. The raised dots 3 are evenly distributed in an array and located within the troughs, with each raised dot corresponding to a trough. The apex of each raised dot 3 is at the same height as the apex of a crest. Unlike Embodiment 2, in this embodiment, the protrusion 3 is in the shape of a regular square frustum, and the bottom width of the protrusion 3 is greater than the bottom width of the crest portion. This ensures that when the adhesive film body 1 is wound and stacked, the crest portion on the reverse side of the outer adhesive film body 1 will not be able to be embedded into the trough portion on the front side of the inner adhesive film body 1 due to the obstruction of the protrusion 3 on the front side of the inner adhesive film body 1, thereby more effectively preventing the adhesive film from sticking together.

[0035] The apparatus for preparing the anti-adhesive encapsulating film includes an embossing unit consisting of a fabric embossed belt 4 and an extrusion roller group 5; an extrusion die 10 located upstream of the embossing unit; a pre-cooling unit, a thickness measuring unit, and a post-cooling unit arranged sequentially downstream of the embossing unit. The pre-cooling unit contains four cooling rollers 8 with internally circulating coolant; the thickness measuring unit contains two guide rollers 9 and a thickness gauge; the post-cooling unit contains three cooling rollers 8 with internally circulating coolant; two guide rollers 9 are located upstream of the extrusion die 10; and a cooling roller 8 is located between the extrusion die 10 and the extrusion roller group 5. The fabric embossed belt 4 is a closed flexible loop, supported by the guide rollers 9 and the cooling rollers 8 before the thickness measuring unit, and tensioned and wound around the path formed by these cooling rollers 8 and guide rollers 9. The cooling rollers 8 are driven by a drive mechanism consisting of a motor and a transmission chain to rotate, providing the moving power for the fabric embossed belt 4. The extrusion roller assembly 5 includes a positive pressure roller and a back pressure roller. The positive pressure roller is a steel roller, and the back pressure roller is a rubber roller. The positive pressure roller and the back pressure roller roll against each other. The fabric-based embossed tape 4 passes between the positive pressure roller and the back pressure roller. Both the positive pressure roller and the back pressure roller are hollow structures with coolant circulating inside to keep their surfaces at a low temperature. Unlike Embodiment 1, in this embodiment, the fabric-based embossed tape 4 includes a base fabric 7 and a removable embossing master 6. The embossing master 6 is also made of fabric and is attached to and covered on the base fabric 7. The threads on the embossing master 6 are woven to form regularly parallel and evenly distributed raised lines. The unevenness on the surface of the embossing master 6 created by the raised lines constitutes the master pattern. The surface of the embossing master 6 is also coated with a Teflon coating. The surface of the positive pressure roller of the extrusion roller assembly 5 is also processed with raised lines and pits to form the ridges 2 and raised dots 3 on the front side of the adhesive film body 1. The rest is the same as in Embodiment 1.

[0036] The manufacturing process of this anti-adhesion encapsulating film is similar to that of traditional cast film production. Semi-finished resin particles with formulated additives are fed into an extruder for melting, plasticizing, and thorough mixing. The mixture is then extruded through an extrusion die 10 via a screw extruder, resulting in a high-temperature molten sheet-like flowing colloid. The molten flowing colloid flowing from the extrusion die 10 is cast and adhered to the surface of the fabric embossing belt 4, and then enters the gap between the extrusion roller group 5. It is then extruded into a thinner sheet by the extrusion roller group 5, and simultaneously rapidly cooled and solidified into a film under the cooling effect of the extrusion roller group 5 surface. During the extrusion by the extrusion roller group 5, the master pattern and the raised lines on the surface of the positive pressure roller are imprinted onto the film during the cooling and solidification process. The pattern of the master pattern is transferred to the film, ultimately completing the embossing and shaping on the back of the formed film, generating a mirrored raised pattern. Simultaneously, the pattern on the positive pressure roller is also transferred to the front of the film. Then, the fabric embossed belt 4, carrying the adhesive film, continues to cool in the pre-cooling unit. When it reaches the guide roller 9 of the thickness measuring unit, the adhesive film peels off from the fabric embossed belt 4. The adhesion between the Teflon coating and the now cooled adhesive film is greatly reduced, ensuring smooth peeling. The peeled adhesive film is first tested for thickness by a thickness gauge, then further cooled to near room temperature in the post-cooling unit, and finally output from the preparation device for subsequent slitting and winding. The fabric embossed belt 4, with the adhesive film peeled off, turns from the guide roller 9 of the thickness measuring unit and returns to the extrusion die 10, thus repeating the cycle.

Claims

1. An anti-sticking encapsulation adhesive film comprising an adhesive film body (1), characterized in that, The adhesive film body (1) is provided with convex patterns on both sides, which can form gaps between the stacked adhesive film bodies (1). The convex patterns include raised lines (2) arranged in parallel and uniformly on the surface of the adhesive film body (1). The adhesive film body (1) is in a wave shape, having a wave crest and a wave trough. The convex patterns on the front surface of the adhesive film body (1) further include convex points (3) arranged in an array. The convex points (3) are located in the wave trough.

2. The anti-blocking encapsulation adhesive film according to claim 1, wherein, The vertex of the convex point (3) is at the same height as the vertex of the wave crest.

3. The anti-blocking encapsulation adhesive film according to claim 1, wherein, The convex point (3) is in the shape of a spherical cap.

4. The anti-blocking encapsulation adhesive film according to claim 1, wherein, The convex point (3) is in the shape of a regular quadrangular frustum.

5. An apparatus for producing the blocking preventing packaging adhesive film according to any one of claims 1 to 4, characterized by, The base embossing belt (4) and the extrusion roller group (5) are provided with a plurality of cooling rollers and deflection rollers. The base embossing belt (4) is tightly installed on the cooling rollers and the deflection rollers. The base embossing belt (4) is provided with female patterns which are mirror images of the convex patterns.

6. The apparatus of claim 5 wherein, The base embossing belt (4) includes a base cloth (7) and a detachable embossing female body (6). The embossing female body (6) is covered on the base cloth (7).

7. The apparatus of claim 5 wherein, The surface of the base embossing belt (4) is further coated with a Teflon coating.

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