Release film coated with graphene composite high polymer material

Abstract

The utility model discloses a graphene composite high polymer material coated release film. The graphene composite high polymer material coated release film comprises a release film main body, a graphene composite high polymer material layer and an adhesive layer, the release film main body is provided with a heat dissipation structure, and the heat dissipation structure comprises a heat conduction layer and a contact layer; a stable structure is arranged between the heat conduction layer and the graphene composite high polymer material layer. According to the utility model, the stable structure is arranged to ensure the coverage rate and distribution stability of the graphene composite high polymer material layer in a fluid state, so that the condition of deviation or calendering change deviation during cooling caused by gravity or other reasons is prevented; the heat dissipation stability and the heat dissipation effect of each position of the graphene composite high polymer material coated release film are ensured; the heat dissipation structure is used for increasing the direct contact area between the attached element and the outside, the heat conduction and dissipation efficiency is improved, and the use requirements of an existing special multilayer circuit board product or a high-operation high-heat generation element are met.

Description

Technical Field

[0001] The utility model relates to the technical field of release films, and particularly relates to a graphene composite polymer material coated release film. Background Art

[0002] Multi-layer circuit boards must be combined between layers through a hot pressing method, and a pressing coated release film must be used in the hot pressing process to achieve the functions of coating and releasing.

[0003] At present, the coated release films used for pressing multi-layer circuit boards generally use several different functional layers such as a coating layer (polyolefin, epoxy resin, polypropylene, polytetrafluoroethylene, etc.), a release layer (PTFE, FEP, ETFE, etc.), a heat conduction layer (steel plate, copper layer, aluminum sheet, etc.), and a buffer layer (kraft paper, silica gel pad, etc.) in a stacked combination. However, for special multi-layer circuit board products such as high-frequency and high-speed, high-precision, and ultra-multi-layer (>30 layers), it is difficult to achieve good effects by using a commonly configured coated release film. If used improperly, problems such as pressing skateboard, layer deviation, uneven expansion and contraction, and poor glue filling may even occur; and the current coated release film materials generally have a short lifespan and are prone to aging in the high-temperature and high-pressure environment of pressing, resulting in fewer usage times, a large amount of coated release film used, and an increase in pressing costs.

[0004] Therefore, for the lamination production of special multi-layer circuit board products such as high-frequency, high-speed, high-precision, and ultra-multi-layer (>30 layers), it is necessary to provide a release film with good comprehensive properties such as conformal coating, release, heat conduction, and buffering, and a long service life. In response to the above problems, people have invented the patent number: 202022213675.8, which discloses a graphene composite polymer material conformal release film, which includes a first release layer, a first graphene composite polymer material layer, a first adhesive layer, a first fluorosilicone rubber layer, a graphene composite metal-modified polymer composite buffer layer, a second fluorosilicone rubber layer, a second adhesive layer, a second graphene composite polymer material layer, and a second release layer; among them, the graphene composite metal-modified polymer composite buffer layer is made of one of graphene composite aluminum powder-modified nylon composite material and graphene composite nano-copper-modified epoxy resin composite material; the conformal release film provided by the present invention has the conformal coating, release, and buffering characteristics of polymer materials. Through the combination of graphene and metal, the properties such as heat conduction, electrical conductivity, strength, and thermal stability are improved, so that the overall conformal release film has good comprehensive properties and can provide good conformal release film efficacy for the lamination production of special multi-layer circuit boards. However, the following problems still exist in this release film: 1. The frameless structure of the graphene composite polymer material conformal release film, when the graphene composite metal-modified polymer composite buffer layer is in a fluid state, due to external force factors during the manufacturing process, uneven distribution occurs, resulting in uneven distribution of the graphene composite material on the release film, resulting in a high regional error in heat dissipation in the heat conduction area, affecting the heat conduction and electrical conductivity performance; 2. The existing heat dissipation method of the graphene composite polymer material conformal release film is to transfer heat to the graphene composite metal-modified polymer composite buffer layer for heat discharge, but there are multiple other covering layers between the pasted part and the heat dissipation part of the graphene composite polymer material conformal release film, and the direct heat dissipation area between the contact surface of the pasted component and the outside is small, affecting the heat dissipation effect and efficiency, and unable to meet the use requirements of existing special multi-layer circuit board products or components with high operating heat generation. Summary of the Invention

[0005] The present utility model aims at the deficiencies of the existing technology and provides a graphene composite polymer material conformal release film, aiming to solve the technical problems of uneven distribution of graphene composite polymer material in the release film, low heat conduction and heat dissipation efficiency, and poor effect in the existing technology.

[0006] The technical solution adopted by the present utility model to achieve the above object is:

[0007] A graphene composite polymer material-coated release film includes a release film body, a graphene composite polymer material layer, and an adhesive layer; the release film body is provided with a heat dissipation structure, and the heat dissipation structure includes a heat conduction layer and a contact layer; the graphene composite polymer material layer is disposed on the heat conduction layer; a stable structure is provided between the heat conduction layer and the graphene composite polymer material layer.

[0008] For further improvement, the heat conduction layer is a heat-conducting silica gel layer, and the thickness of the heat conduction layer is 2 mm - 4 mm; the heat conduction layer includes a top heat conduction layer and two side heat conduction layers; the top heat conduction layer is disposed on the top of the release film body, and the side heat conduction layers are respectively disposed on two side surfaces of the release film body.

[0009] For further improvement, the contact layer includes a plurality of heat-conducting silica gel strips, and the heat-conducting silica gel strips are arranged in a spaced array at the bottom of the release film body; corrugated structure grooves are provided on both side edges of the heat-conducting silica gel strips.

[0010] For further improvement, the release film body is provided with a plurality of through holes, and heat conduction columns are provided in the through holes. One end of the heat conduction column is connected to the top heat conduction layer, and the other end of the heat conduction column is connected to the heat-conducting silica gel strip; through holes No. 1 are further provided in the through holes arranged on both side edges, and heat conduction columns No. 1 are provided in the through holes No. 1. One end of the heat conduction column No. 1 is connected to the heat conduction column, and the other end of the heat conduction column No. 1 is connected to the side heat conduction layer.

[0011] For further improvement, the top heat conduction layer and the two side heat conduction layers are each provided with a plurality of grooves.

[0012] For further improvement, the stable structure is a mesh structure, and the mesh structure is composed of a plurality of frames. The mesh structure is covered on the surfaces of the top heat conduction layer and the side heat conduction layers by means of welding or screen printing; uneven matte layers are provided on the top surfaces inside the frames and on the top surface of the heat-conducting silica gel layer.

[0013] For further improvement, the graphene composite polymer material layer includes a covering layer and a filling layer; the filling layer includes a plurality of graphene filling columns, and the graphene filling columns respectively cover inside the frames; the covering layer is disposed on the filling layer.

[0014] For further improvement, the thickness of the graphene composite polymer material layer is 1 - 3 mm.

[0015] For further improvement, the adhesive layer includes a plurality of adhesive strips, and the plurality of adhesive strips are respectively disposed between two of the heat-conducting silica gel strips, and both sides of the adhesive layer are respectively attached to the corrugated structure grooves.

[0016] Compared with the prior art, one or more of the above technical solutions in the graphene composite polymer material coated release film provided by the embodiments of the present invention have at least one of the following technical effects:

[0017] 1. The present invention provides a stable structure composed of multiple frames to ensure the coverage rate and stable distribution of the graphene composite polymer material layer in a fluid state, prevent offset during cooling or offset due to calendering changes caused by gravity or other reasons, ensure uniform coverage, thereby ensuring the heat dissipation stability of each position of the graphene composite polymer material coated release film, and ensuring the heat dissipation efficiency and heat dissipation effect;

[0018] 2. By providing a heat dissipation structure to increase the direct contact area between the adhered component and the outside world, and using a top surface heat conduction layer and two side heat conduction layers to increase the heat dissipation area, the heat conduction and heat dissipation efficiency are greatly improved, the heat dissipation effect of heat discharge is improved, and the use requirements of existing special multi-layer circuit board products or high-operation and high-heat generating components are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the overall structure of the graphene composite polymer material coated release film of this embodiment;

[0021] Figure 2 It is a top view schematic diagram of the graphene composite polymer material coated release film of this embodiment;

[0022] Figure 3 It is Figure 2 the cross-sectional view taken along line A-A in

[0023] Figure 4 It is Figure 3 the enlarged schematic diagram of A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereby.

[0025] Embodiment, see the attached Figures 1 to 4, A graphene composite polymer material-coated release film 1 includes a release film body 2, a graphene composite polymer material layer 3, and an adhesive layer 4; the release film body 2 is provided with a heat dissipation structure 5, and the heat dissipation structure 5 includes a heat conduction layer 6 and a contact layer 7; the graphene composite polymer material layer 3 is disposed on the heat conduction layer 6; a stable structure 8 is provided between the heat conduction layer 6 and the graphene composite polymer material layer 3; the heat dissipation structure 5 is used to increase the direct contact area between the element to be bonded and the outside, thereby improving the efficiency of heat conduction and dissipation and enhancing the heat dissipation effect of heat discharge.

[0026] The heat conduction layer 6 is a heat-conducting silica gel layer, and the thickness of the heat conduction layer 6 is 2 mm - 4 mm; the heat conduction layer 6 includes a top surface heat conduction layer 60 and two side surface heat conduction layers 61; the top surface heat conduction layer 60 is disposed on the top of the release film body 2, and the side surface heat conduction layers 61 are respectively disposed on both side surfaces of the release film body 2. The top surface heat conduction layer 60 and the two side surface heat conduction layers 61 are used to increase the heat dissipation area, thereby enhancing the heat dissipation effect.

[0027] The contact layer 7 includes a plurality of heat-conducting silica gel strips 70, and the heat-conducting silica gel strips 70 are arranged in a spaced array at the bottom of the release film body 2; corrugated structure grooves 71 are provided on both side edges of the heat-conducting silica gel strips 70, and the corrugated structure grooves 71 are used to provide a buffering effect while ensuring the pasting stability of the subsequent adhesive layer 4.

[0028] The release film body 2 is provided with a plurality of through holes, and heat conduction columns 8 are provided in the through holes. One end of the heat conduction column 8 is connected to the top surface heat conduction layer 60, and the other end of the heat conduction column 8 is connected to the heat-conducting silica gel strip 70; through holes one are further provided in the through holes arranged on both side edges, and heat conduction columns one 9 are provided in the through holes one. One end of the heat conduction column one 9 is connected to the heat conduction column 8, and the other end of the heat conduction column one 9 is connected to the side surface heat conduction layer 61. The top surface heat conduction layer 60 and the two side surface heat conduction layers 61 are each provided with a plurality of grooves 10, and the grooves 10 are used to increase the heat dissipation area, thereby improving the efficiency of heat conduction and dissipation.

[0029] The stable structure 8 is a net structure, which is composed of a plurality of frames 80. The net structure covers the surfaces of the top heat conduction layer 60 and the side heat conduction layer 61 in a welding or screen printing manner. The frame 80 is used to ensure the coverage rate and stable distribution of the graphene filling columns in each frame 80, prevent deviation or calendering change during cooling due to gravity or other reasons, ensure uniformity, and thus ensure the heat dissipation stability at each position of the graphene composite polymer material covering and releasing film 1. Concave-convex matte layers are provided on the top surfaces of the frame 80 and the heat conduction silica gel layer 60. The concave-convex matte layers are used to improve the adhesion stability during the covering of the graphene composite polymer material covering and releasing film 1 and prevent detachment after coating.

[0030] The thickness of the graphene composite polymer material layer 3 is 1-3 mm. The graphene composite polymer material layer 3 includes a covering layer 30 and a filling layer 31. The filling layer 31 includes a plurality of graphene filling columns, which are respectively covered within the frame 80. The covering layer 30 is arranged on the filling layer 31. The graphene composite polymer material layer 3 is used to improve the heat conduction and dissipation effect and the strength characteristics of the graphene composite polymer material covering and releasing film 1, and greatly improve the heat dissipation efficiency.

[0031] The adhesive layer 4 includes a plurality of adhesive strips 40. The plurality of adhesive strips 40 are respectively arranged between two heat conduction silica gel strips 70, and both sides of the adhesive layer 4 are respectively attached to the corrugated structure grooves 71. The adhesive layer 4 is used for pasting and covering with external components.

[0032] In the present utility model, a stable structure composed of a plurality of frames is provided to ensure the coverage rate and stable distribution of the graphene composite polymer material layer in a fluid state, prevent deviation or calendering change deviation during cooling due to gravity or other reasons, ensure the uniformity of covering, and thus ensure the heat dissipation stability at each position of the graphene composite polymer material covering and releasing film, and ensure the heat dissipation efficiency and heat dissipation effect. A heat dissipation structure is provided to increase the direct contact area between the element to be attached and the outside, and the top heat conduction layer and two side heat conduction layers are used to increase the heat dissipation area, greatly improve the heat conduction and dissipation efficiency of heat, improve the heat dissipation effect of heat discharge, and meet the use requirements of existing special multi-layer circuit board products or high-operation and high-heat-generating components.

[0033] The present utility model is not limited to the above embodiments. Other graphene composite polymer material covering and releasing films obtained by adopting the same or similar structures or devices as those in the above embodiments of the present utility model are within the protection scope of the present utility model.

Claims

1. A graphene composite polymer material-coated release film, characterized in that: The graphene composite polymer material-coated release film includes a release film main body, a graphene composite polymer material layer, and an adhesive layer; the release film main body is provided with a heat dissipation structure, and the heat dissipation structure includes a heat conduction layer and a contact layer; the graphene composite polymer material layer is disposed on the heat conduction layer; a stable structure is provided between the heat conduction layer and the graphene composite polymer material layer; the stable structure is a network structure, and the network structure is composed of a plurality of frames.

2. The graphene composite polymer material-coated release film according to claim 1, wherein: The heat conduction layer is a heat conductive silica gel layer, and the thickness of the heat conduction layer is 2 mm - 4 mm; the heat conduction layer includes a top heat conduction layer and two side heat conduction layers; the top heat conduction layer is disposed on the top of the release film main body, and the side heat conduction layers are respectively disposed on two side surfaces of the release film main body.

3. The graphene composite polymer material-coated release film according to claim 2, characterized in that: The contact layer includes a plurality of heat conductive silica gel strips, and the heat conductive silica gel strips are arranged on the bottom of the release film main body in a spaced array manner; corrugated structure grooves are provided on both side edges of the heat conductive silica gel strips.

4. The graphene composite polymer material-coated release film according to claim 3, characterized in that: The release film main body is provided with a plurality of through holes, and heat conduction columns are arranged in the through holes. One end of the heat conduction column is connected to the top heat conduction layer, and the other end of the heat conduction column is connected to the heat conductive silica gel strip; through holes I are further provided in the through holes arranged on both side edges, and heat conduction columns I are arranged in the through holes I. One end of the heat conduction column I is connected to the heat conduction column, and the other end of the heat conduction column I is connected to the side heat conduction layer.

5. The graphene composite polymer material-coated release film according to claim 4, wherein: The top heat conduction layer and the two side heat conduction layers are each provided with a plurality of grooves.

6. The graphene composite polymer material-coated release film according to claim 5, wherein: The network structure is covered on the surfaces of the top heat conduction layer and the side heat conduction layer by means of welding or screen printing; uneven matte layers are provided on the top surfaces of the frames and the top surface of the heat conductive silica gel layer.

7. The graphene composite polymer material-coated release film according to claim 6, wherein: The graphene composite polymer material layer includes a covering layer and a filling layer; the filling layer includes a plurality of graphene filling columns, and the graphene filling columns respectively cover within the frames; the covering layer is disposed on the filling layer.

8. The graphene composite polymer material-coated release film according to claim 7, wherein: The thickness of the graphene composite polymer material layer is 1 - 3 mm.

9. The graphene composite polymer material-coated release film according to claim 8, wherein: The adhesive layer includes a plurality of adhesive strips, and the plurality of adhesive strips are respectively arranged between two of the heat conductive silica gel strips, and both sides of the adhesive layer are respectively fitted with the corrugated structure grooves.

Images