Macromolecular coated release film capable of pressing edges and blocking glue

Abstract

The utility model provides an edge-pressing and glue-blocking high-molecular coated release film. The edge-pressing and glue-blocking high-molecular coated release film is of a laminated structure formed by sequentially laminating a surface release layer, a coated layer and a bottom release layer, the macromolecular coated release film comprises a functional area and an edge pressing area in the plane direction; the edge pressing areas are distributed on the edges of more than or equal to two sides of the functional area; the thickness of the edge pressing area is smaller than that of the functional area, and the thickness of the thinnest position of the edge pressing area is 4 / 5-1 / 3 of that of the functional area; by adopting an edge-pressing and glue-blocking structure, the multi-layer composite film body forms an integral structure in an edge combination state, a glue-blocking edge is formed, the edge of the film body is sealed, and a combined film body with a covering and releasing function is formed in the middle, so that the problem that glue of a covering layer overflows out of the range of a releasing layer during application is effectively solved, and the integral film body structure is convenient to clean; the problem of carrying impurities is reduced, automatic processing application is easy to realize, and the probability of problems of sliding plates and interlayer deviation in the pressing process of the circuit board body during application is reduced.

Description

Technical Field

[0001] The utility model relates to the field of composite polymer films, in particular to a polymer coating release film with edge-pressing and adhesive-blocking properties. Background Art

[0002] In the hot pressing process of laminated plate products such as circuit boards, polymer coating release films are needed as auxiliary processing tools for coating, buffering, heat conduction and release during the pressing process.

[0003] Since it is a consumable material in the processing process and does not follow the circuit board body into the next process, the upper and lower surfaces of the general polymer coating release film are both release layers, and the middle is set as a coating layer and other functional layers.

[0004] And because there are many types of circuit board products, there are also many types of polymer coating release films that match the lamination processing procedures of specific circuit boards. For the lamination processing of circuit boards with higher process requirements, the method of stacking films with different functions to form a film with comprehensive performance is generally used to provide a comprehensive functional film required for processing. The current comprehensive functional film is used in application by first cutting the release layer and the coating layer into the required size of the same size, and then directly laying them layer by layer on the upper and lower surfaces of the circuit board to provide a coating and release effect for the circuit board.

[0005] The current layer-by-layer structure and application method, because each layer of the film is generally cut into equal sizes, and the coating layer has a large glue flow during the lamination process, but the release layer on the upper and lower surfaces is not easy to flow, it is easy for the coating layer to flow to outside the range of the release film layer during the lamination process, causing contamination of the circuit board surface or the lamination table. If the area of ​​the release film layer is increased to solve this problem, the processing flow and processing cost will be increased, and the overflow problem cannot be completely solved; in addition, the layer-by-layer laying method also has the problems of a relatively complicated laying process, cumbersome layer-by-layer cleaning before application, and easy to carry impurities to the surface of the circuit board. The film layers are relatively thin and it is not easy to achieve automation during application; and because the circuit board itself is stacked in a layer-by-layer laying manner during lamination, and the coating release layer is also stacked in a layer-by-layer laying manner, the overall lamination layout structure forms a layer-by-layer structure of many layers, which increases the probability of the circuit board body generating a slide plate and interlayer displacement during the lamination process.

[0006] Based on the above background and problems, it is necessary to provide a polymer coating release film with a pressure edge adhesive resistance structure. Utility Model Content

[0007] The utility model is mainly to solve the problems that the prior art adopts layer-by-layer laying to form a multi-layer coating release film and applies it to the circuit board pressing process, the coating layer overflows and pollutes the board surface, each layer is easy to carry impurities, and the circuit board body pressing slide plate and inter-layer deviation are easy to occur. A polymer coating release film with edge pressure and glue resistance is provided. The polymer coating release film is a laminated structure formed by sequentially stacking a surface release layer, a coating layer, and a bottom release layer; the polymer coating release film includes a functional area and a pressure edge area in the plane direction; the pressure edge area is distributed on the edges of more than or equal to two sides of the functional area; the thickness of the pressure edge area is less than the thickness of the functional area, and the thickness of the thinnest position of the pressure edge area is 4 / 5 to 1 / 3 of the functional area.

[0008] Furthermore, the edge pressing area is evenly distributed with patterns, and the patterns are mesh patterns, strip patterns, or curved patterns.

[0009] Furthermore, the height of the lines protruding from the surface of the edge pressing area is 3 micrometers to 15 micrometers.

[0010] Optionally, a single step structure is formed between the edge pressing area and the functional area.

[0011] Optionally, there are a plurality of continuous step structures greater than or equal to two between the edge pressing area and the functional area.

[0012] Optionally, an arc-shaped connection structure is formed between the edge pressing area and the functional area.

[0013] Furthermore, the arc surface of the arc-shaped connection structure is convex toward the coating layer.

[0014] Furthermore, the surface release layer or the bottom release layer is a polytetrafluoroethylene layer or a polyimide layer or a TPX layer or an ETFE layer.

[0015] Furthermore, the coating layer is a polyolefin layer, an epoxy resin layer, a polyimide layer, a PP layer, or a PE layer.

[0016] Furthermore, the coating layer is a multi-layer coating layer structure having more than or equal to two layers.

[0017] The utility model adopts the structure of edge pressure and glue resistance to make the multi-layer composite film form an overall structure in an edge-bonded state, form a glue resistance edge, realize the edge sealing of the film body and the combined film with coating and release effects in the middle position, effectively solves the problem of glue overflow of the coating layer beyond the range of the release layer when it is applied in a layer-by-layer laying manner, the overall film body structure is easy to clean, reduces the problem of carrying impurities, is easy to realize automated processing and application, and reduces the overall number of stacking layers of the stacking structure with the circuit board during application, and reduces the probability of the circuit board body generating sliding plates and inter-layer deviation problems during the pressing process; further arranging patterns on the pressing edge can effectively disperse the glue overflow of the coating layer during pressing of the glue resistance edge during application, reduce the direct impact of the glue overflow on the glue resistance edge, and prevent the problem of the glue resistance edge bursting; further adopting glue resistance edges with multiple continuous step structures or arc-shaped connection structures can further disperse the glue overflow pressure of the coating layer, and form a coating release film with higher reliability and longer application life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of a polymer coating release film of an edge-pressing adhesive of the utility model;

[0019] Figure 2 It is a schematic diagram of the planar structure of a polymer coating release film of an edge-pressing adhesive of the utility model;

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the polymer coating release film of the utility model having a plurality of continuous step-structured edge-pressing regions;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the polymer coating release film with an edge pressing area having an arc-shaped connection structure of the utility model.

[0022] Description of Figure Numbers:

[0023] Label name Label name 10 Laminating release film 130 Bottom release layer 100 Functional area 1100 Texture 200 Edge pressing area 10A Multiple continuous step structure edge pressure area coating release film 110 Surface release layer 10B The release film of the arc-shaped connection structure edge pressing area 120 Coating layer / /

[0024] The utility model will further illustrate the technical content in the specific implementation section in combination with the drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the utility model.

[0026] See also Figure 1 , Figure 1 The utility model is a schematic diagram of the cross-sectional structure of a polymer coating release film with edge-pressing adhesive.

[0027] The polymer coating release film 10 for edge pressure resistance provided in this embodiment has a laminated structure formed by sequentially stacking a surface release layer 110, a coating layer 120, and a bottom release layer 130; the polymer coating release film 10 includes a functional area 100 and an edge pressure area 200 in the plane direction; the edge pressure area 200 is distributed on the edges of more than or equal to two sides of the functional area 100; the thickness of the edge pressure area 200 is less than the thickness of the functional area 100, and the thickness of the thinnest position of the edge pressure area 200 is 4 / 5 to 1 / 3 of the functional area 100.

[0028] In this embodiment, the surface release layer 110, the coating layer 120, and the bottom release layer 130 are stacked in sequence to form a laminated structure, and the laminated structure is pressed using a stepped pressing roller to form a pressing area 200, and then the edges are cut to form a coating release film 10, so that the laminated structure is formed into an integral structure through the pressing area 200. If the film body is continuously processed longitudinally and then cut transversely, the single film body formed has a structure with pressing areas 200 on two symmetrical sides. If it is necessary to form a single film body with a structure with pressing areas 200 on all four sides, the remaining two symmetrical sides are pressed after the transverse cutting.

[0029] Since the thickness of the multilayer composite membranes with different structural properties is different, the thickness of the edge pressing area 200 formed by pressing is also different. The edge pressing area 200 ensures "pressing to death" and firm bonding, that is, in the subsequent application process, there will be no secondary glue overflow in the edge pressing area 200.

[0030] See also Figure 2 , Figure 2 The utility model is a schematic diagram of the planar structure of a polymer coating release film with edge-pressing adhesive.

[0031] In this embodiment, the edge pressing area 200 is evenly distributed with textures 1100, and the textures 1100 are mesh textures, strip textures, or curved textures, and the height of the textures protruding from the surface of the edge pressing area is 3 microns to 15 microns; that is, a pressing roller with textures is used for pressing, and the textures 1100 are provided to buffer and disperse the pressure of the glue flow of the coating layer 120 during the application process, thereby preventing the edge pressing area 200 from bursting due to excessive glue overflow during the application process.

[0032] Please continue reading Figure 1 In the present embodiment, a single step structure is formed between the edge pressing area 200 and the functional area 100; that is, a single step structure is formed using a single step pressing roller, which is a common pressing structure.

[0033] See also Figure 3 , Figure 3 It is a schematic diagram of the cross-sectional structure of the polymer coating release film of the utility model having a plurality of continuous step-structured edge pressing areas.

[0034] In one embodiment, there are a plurality of continuous step structures greater than or equal to two between the edge pressing area 200 and the functional area 100, forming a coating release film 10A with a plurality of continuous step structure edge pressing areas as a whole; that is, a plurality of continuous step structure pressing rollers are used to form a plurality of continuous step structure edge pressing areas 200, which can better buffer and disperse the glue flow and overflow pressure of the coating layer during the application process.

[0035] See also Figure 4 , Figure 4 It is a schematic diagram of the cross-sectional structure of the polymer coating release film with an edge pressing area having an arc-shaped connection structure of the utility model.

[0036] There is an arc-shaped connection structure between the edge pressing area 200 and the functional area 100; the arc surface of the arc-shaped connection structure bulges toward the coating layer 120, and the coating release film 10B of the edge pressing area of ​​the arc-shaped connection structure is formed as a whole; that is, a pressing roller with a convex arc-shaped structure is used to press and form the edge pressing area 200 of the arc-shaped connection structure, which can also better buffer and disperse the glue flow and overflow pressure of the coating layer during the application process.

[0037] In this embodiment, the surface release layer 110 or the bottom release layer 130 is a polytetrafluoroethylene layer, a polyimide layer, a TPX layer, or an ETFE layer; the coating layer 120 is a polyolefin layer, an epoxy resin layer, a polyimide layer, a PP layer, or a PE layer.

[0038] The release layer and the coating layer can be combined according to the application requirements, and the material properties of the film bodies can be matched, and the overall film body formed can meet the combination form of circuit board processing.

[0039] In this embodiment, the coating layer 120 is a multi-layer coating layer structure having two or more layers.

[0040] According to application requirements, the coating layer 120 may be selected from functional layers such as a coating layer, a reinforcement layer, and a heat conductive layer to form a laminated structure.

[0041] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the embodiment of the utility model. All equivalent structural changes made by using the description and drawings of the embodiment of the utility model under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the embodiment of the utility model.

Claims

1. A polymer coating release film for edge-blocking adhesive, characterized in that: The polymer coating release film is a laminated structure formed by sequentially laminating a surface release layer, a coating layer, and a bottom release layer; The polymer coating release film comprises a functional area and a pressure edge area in the plane direction; The edge pressing area is distributed on the edges of two or more sides of the functional area; The thickness of the edge pressing area is smaller than that of the functional area, and the thickness of the edge pressing area at the thinnest position is 4 / 5 to 1 / 3 of that of the functional area.

2. The polymer coating release film for edge pressure resistance according to claim 1, characterized in that: The edge pressing area is evenly distributed with patterns, and the patterns are mesh patterns, strip patterns, or curved patterns.

3. The polymer coating release film for edge-pressing adhesive according to claim 2, characterized in that: The height of the lines protruding from the surface of the edge pressing area is 3 micrometers to 15 micrometers.

4. A polymer coating release film for edge-pressing adhesive according to claim 1 or 2, characterized in that: A single step structure is formed between the edge pressing area and the functional area.

5. A polymer coating release film for edge pressure resistance according to claim 1 or 2, characterized in that: There are more than or equal to two continuous step structures between the edge pressing area and the functional area.

6. A polymer coating release film for edge pressure resistance according to claim 1 or 2, characterized in that: The edge pressing area and the functional area are connected in an arc shape.

7. The polymer coating release film for edge-pressing adhesive according to claim 6, characterized in that: The arc surface of the arc-shaped connection structure is convex toward the coating layer.

8. A polymer coating release film for edge-pressing adhesive according to claim 1 or 2, characterized in that: The surface release layer or the bottom release layer is a polytetrafluoroethylene layer or a polyimide layer or a TPX layer or an ETFE layer.

9. A polymer coating release film for edge-pressing adhesive according to claim 1 or 2, characterized in that: The coating layer is a polyolefin layer, an epoxy resin layer, a polyimide layer, a PP layer or a PE layer.

10. The polymer coating release film for edge pressure resistance adhesive according to claim 9, characterized in that: The coating layer is a multi-layer coating layer structure having two or more layers.

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