Graphene composite polyimide film and hot-pressing pre-pasting equipment

Abstract

The utility model relates to the technical field of hot-pressing equipment, in particular to a graphene composite polyimide film and hot-pressing pre-pasting equipment, the graphene composite polyimide film is formed by sequentially laminating and compounding a graphene film layer, a pair of PI film layers and a pair of bonding layers, the graphene film layer is located between the pair of PI film layers, and the bonding layers are located between the pair of PI film layers. Any bonding layer is located between the graphene thin film layer and one PI thin film layer, a plurality of first through holes are formed in the graphene thin film layer, a plurality of second through holes are formed in the pair of PI thin film layers respectively, and the positions of the first through holes correspond to the positions of the second through holes. According to the graphene composite polyimide film disclosed by the utility model, the plurality of first through holes are formed in the graphene film layer, and the plurality of second through holes are formed in the PI film layer, so that the phenomenon that bubbles remain between the graphene film layer and the PI film layer in the process of hot-pressing and packaging the pair of PI film layers on the graphene film layer is effectively improved; the defects in the prior art are overcome.

Description

Technical Field

[0001] This utility model relates to the field of hot pressing equipment technology, and in particular to a graphene composite polyimide film and a hot pressing pre-applied device. Background Technology

[0002] Graphene-polyimide composite films refer to composite films composed of graphene layers and polyimide layers stacked sequentially. For example, Chinese invention patent CN115449103A discloses a high-barrier graphene-polyimide composite film, which consists of a three-layer structure, from top to bottom: a PI film layer (polyimide film layer), a graphene layer, and a PI film layer. This composite film forms a "PI film-graphene-PI film" structure by attaching a graphene layer to a PI film and then attaching another PI film to the surface of the graphene layer. Compared to traditional PI films, this composite film significantly improves the water-blocking performance of the film, broadens the application fields of PI films, and has wide application scenarios in mobile phone electronic products, chemical and medical equipment, etc.

[0003] However, during the hot-pressing process of bonding the PI film layer onto the graphene layer, air bubbles are prone to remain between the PI film layer and the graphene layer. These air bubbles can adversely affect the performance of the composite film. Utility Model Content

[0004] To address the technical problem of air bubbles easily remaining between the PI film layer and the graphene layer in the prior art, Embodiment 1 of this utility model provides a graphene composite polyimide film composed of a graphene film layer, a pair of PI film layers and a pair of adhesive layers stacked sequentially.

[0005] Specifically, the graphene film layer is located between a pair of PI film layers, and any adhesive layer is located between the graphene film layer and one of the PI film layers, used to bond and fix the PI film layer and the graphene film layer.

[0006] Several first through holes are formed on the graphene film layer, and several second through holes are formed on a pair of PI film layers respectively. The positions of the several first through holes and the several second through holes formed on the pair of PI film layers correspond one-to-one.

[0007] Furthermore, the porosity of the graphene film layer is no greater than 5%.

[0008] Furthermore, the central axes of any first through hole and a pair of second through holes at a given location are collinear, and the diameter of the first through hole is smaller than the diameter of the second through hole.

[0009] Furthermore, Embodiment 2 of this utility model provides a hot-press pre-lamination device for hot-pressing and laminating the above-mentioned graphene composite polyimide film, characterized in that it comprises:

[0010] The support bracket has a fixed platform on top for supporting the graphene composite polyimide film;

[0011] Several positioning modules are set on the platform to position the graphene composite polyimide film.

[0012] A pair of first guide rods are fixedly installed on the support bracket along the length of the support bracket;

[0013] The displacement seat is movably mounted on the support bracket, and the displacement seat is slidably connected to a pair of first guide rods;

[0014] A driving device is mounted on the displacement seat and connected to the support bracket. The driving device is used to drive the displacement seat to slide along a pair of first guide rods.

[0015] A hot press plate, movably positioned between the table and the displacement seat, is used for hot pressing and bonding graphene composite polyimide films;

[0016] The lifting device is fixedly mounted on the displacement seat. The actuator of the lifting device is connected to the hot press plate and is used to drive the hot press plate to move up and down.

[0017] Furthermore, the positioning module includes:

[0018] Assembly holes are provided on the work surface;

[0019] The supporting housing is inserted into the assembly hole, and the top end of the supporting housing is engaged with the assembly hole. The top surface of the supporting housing is coplanar with the top surface of the table.

[0020] The first positioning component is set on the support housing and the platform. The first positioning component is connected to an external air source and is used to position the graphene composite polyimide film.

[0021] The movable plate is movably installed in the inner cavity of the bearing housing along the height direction of the bearing support;

[0022] Several support components are installed on the outer wall of the bearing shell, and these support components are connected to the movable plate to provide elastic support for the movable plate;

[0023] Several second positioning components are set on the movable plate and the table surface to position the graphene composite polyimide film.

[0024] The protective housing is fixedly installed at the bottom of the movable plate, and the protective housing is matched with the positions of several second positioning components.

[0025] Furthermore, the second positioning component includes:

[0026] A receiving hole is formed on the top wall of the inner cavity of the supporting housing, and the receiving hole penetrates the inner wall of the supporting housing and is exposed on the top surface of the receiving hole;

[0027] An assembly cylinder is fixedly mounted on a movable plate. The top port of the assembly cylinder corresponds to the position of the receiving hole, and the bottom port of the assembly cylinder is exposed on the bottom surface of the movable plate.

[0028] Several positioning rods are movably set in the inner cavity of the assembly cylinder. Any one positioning rod is set along the axial direction of the assembly cylinder. The several positioning rods are arranged in a circumferential array around the central axis of the assembly cylinder. The top end of any positioning rod passes through the receiving hole and protrudes from the top surface of the bearing housing.

[0029] Several elastic support mechanisms are set on the assembly cylinder, and the several elastic support mechanisms are respectively connected to several positioning rods to elastically support the several positioning rods;

[0030] The electric telescopic rod is fixedly installed on the bottom wall of the inner cavity of the protective housing;

[0031] The support protrusion is fixedly installed at the head end of the inner rod of the electric telescopic rod, and the position of the support protrusion corresponds to the cavity between several positioning rods.

[0032] Furthermore, the wall thickness of the positioning rod increases from the bottom to the top of the positioning rod, and the circumferential outer cylindrical surface of the positioning rod is parallel to the central axis of the receiving hole.

[0033] Furthermore, the elastic support mechanism includes:

[0034] Several first guide holes are formed on the outer wall of the assembly cylinder. Any one of the first guide holes penetrates the outer wall of the assembly cylinder and communicates with the inner cavity of the assembly cylinder. The extension direction of the central axis of any one of the first guide holes points to the central axis of the receiving hole.

[0035] Several second guide rods are movably inserted into several first guide holes. The head ends of several second guide rods are fixedly connected to the positioning rod, and the tail ends of several second guide rods protrude from the outer surface of the assembly cylinder to guide the positioning rod.

[0036] Assembly protrusions are fixedly installed at the tail ends of several second guide rods;

[0037] Several first springs are respectively sleeved on several second guide rods. The two ends of any one first spring are fixedly connected to the assembly protrusion and the assembly cylinder, respectively, to drive the positioning rod to move towards the central axis of the assembly cylinder.

[0038] Furthermore, the supporting components include:

[0039] An assembly notch is formed on the side wall of the bearing housing, and the assembly notch penetrates the outer wall of the bearing housing and communicates with the inner cavity of the bearing housing;

[0040] The assembly housing is fixedly mounted on the side wall of the bearing housing. The inner cavity of the assembly housing is connected to the assembly notch, and the axial direction of the assembly housing is parallel to the height direction of the bearing support.

[0041] The guide protrusion is fixedly mounted on the movable plate and is movably inserted into the inner cavity of the assembly housing through the assembly notch;

[0042] The second guide hole is formed on the guide protrusion;

[0043] The third guide rod is fixedly installed on the inner wall of the assembly housing. The third guide rod is vertically installed along the axial direction of the assembly housing. The third guide rod is movably inserted into the second guide hole and is used to guide the guide protrusion.

[0044] The second spring is sleeved on the third guide rod. The two ends of the second spring are connected to the guide protrusion and the bottom wall of the inner cavity of the assembly housing, respectively, and are used to elastically support the guide protrusion to move towards the top wall of the inner cavity of the assembly housing.

[0045] Furthermore, the first positioning component includes:

[0046] Several positioning suction cups are embedded in the top outer wall of the carrier housing, and the suction ends of the suction cups are exposed on the top surface of the carrier housing for adsorbing and positioning graphene composite polyimide film.

[0047] Several air channels are embedded in the inner wall of the supporting housing, and the air channels are respectively connected to the air outlet of several positioning suction cups.

[0048] An air extraction pipe is embedded in the inner wall of the tabletop. The output end of the air extraction pipe is connected to the air source, and the input end of the air extraction pipe is connected to the output ends of several air channels. It is used to extract air from several air channels.

[0049] An air intake pipe is embedded in the inner wall of the tabletop. The input end of the air intake pipe is exposed on the outer surface of the tabletop, and the output end of the air intake pipe is connected to the input ends of several air channels to transmit air into the several air channels.

[0050] An electrically controlled valve, installed on the intake pipe, is used to regulate the airflow in the intake pipe.

[0051] The graphene composite polyimide film and hot-press pre-applied equipment according to embodiments of this utility model have the following beneficial effects:

[0052] 1. Embodiment 1 of this utility model effectively improves the phenomenon of residual air bubbles between the graphene film layer and the PI film layer during the process of hot-pressing and encapsulating a pair of PI film layers onto the graphene film layer by opening multiple first through holes on the graphene film layer and multiple second through holes on the PI film layer, thus solving the defects existing in the prior art.

[0053] 2. The positioning module of Embodiment 2 of this utility model sets up multiple sets of second positioning components. During the process of hot-pressing and bonding the PI film layer onto the graphene film layer, the positioning rods of each set of second positioning components cooperate with the first or second through hole to achieve pre-positioning of the graphene film layer or PI film layer, thereby improving the processing accuracy of the equipment.

[0054] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0055] Figure 1 This is an exploded view of the structure according to Embodiment 1 of the present invention;

[0056] Figure 2 This is a perspective view according to Embodiment 2 of the present invention;

[0057] Figure 3 This is an assembly diagram of the positioning module according to Embodiment 2 of the present invention;

[0058] Figure 4 This is an overall cross-sectional view of the positioning module according to Embodiment 2 of this utility model;

[0059] Figure 5 This is an assembly diagram of the second positioning component according to Embodiment 2 of the present invention (one positioning rod is omitted).

[0060] Figure 6 This is an assembly diagram of the support assembly according to Embodiment 2 of the present invention.

[0061] Explanation of reference numerals in the attached diagram:

[0062] 1-Graphene film layer, 11-First through hole, 2-PI film layer, 21-Second through hole, 3-Support bracket, 31-Tabletop, 4-Positioning module, 41-Assembly hole, 42-Support housing, 43-Modible plate, 44-Second positioning component, 441-Accommodation hole, 442-Assembly cylinder, 443-Positioning rod, 4431-Circumferential outer cylindrical surface, 444-Elastic support mechanism, 4441-Second guide rod, 4442-Assembly protrusion 4443-First spring, 445-Electric telescopic rod, 446-Supporting protrusion, 45-Supporting assembly, 451-Assembly notch, 452-Assembly housing, 453-Guide protrusion, 454-Third guide rod, 455-Second spring, 461-Positioning suction cup, 462-Empty pipe, 463-Inlet pipe, 464-Electrically controlled valve, 47-Protective housing, 5-First guide rod, 6-Displacement seat, 7-Hot pressure plate, 8-Lifting device. Detailed Implementation

[0063] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0064] The foregoing and other technical contents, features, and effects of this utility model will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present utility model. Furthermore, in all embodiments, the same reference numerals denote the same elements.

[0065] like Figure 1 As shown, the graphene composite polyimide film of Embodiment 1 of this utility model is composed of a graphene film layer 1, a pair of PI film layers 2 and a pair of adhesive layers (not shown in the figure) stacked sequentially.

[0066] Specifically, such as Figure 1 As shown, a graphene film layer 1 is located between a pair of PI film layers 2. An adhesive layer is located between the graphene film layer 1 and one of the PI film layers 2, used to bond and fix the PI film layer 2 and the graphene film layer 1. A plurality of first through holes 11 are formed on the graphene film layer 1, and a plurality of second through holes 21 are formed on each of the pair of PI film layers 2. The positions of the plurality of first through holes 11 and the plurality of second through holes 21 formed on the pair of PI film layers 2 correspond one-to-one. In this embodiment, this product improves the phenomenon of residual air bubbles between the graphene film layer 1 and the PI film layer 2 during the process of hot-pressing and encapsulating a pair of PI film layers 2 onto the graphene film layer 1 by forming a plurality of first through holes 11 on the graphene film layer 1 and a plurality of second through holes 21 on the PI film layer 2 that correspond one-to-one with the displacement of the first through holes 11.

[0067] Furthermore, such as Figure 1 As shown, the porosity of the graphene film layer 1 is no greater than 5%, and the center distance between any two adjacent pairs of first through holes 11 is in the range of 12mm to 15mm. Preferably, the center distance between any two adjacent pairs of first through holes 11 is 12mm to ensure the thermal conductivity of the graphene film.

[0068] Furthermore, such as Figure 1 As shown, any one of the first through holes 11 is collinear with the central axis of a pair of second through holes 21. The diameter of the first through hole 11 is smaller than the diameter of the second through hole 21, so that when the graphene film layer 1 is encapsulated using a pair of PI film layers 2, the pair of PI film layers 2 can cover the inner surface of the first through hole 11 opened on the graphene film layer 1.

[0069] Furthermore, such as Figure 1 , 2 As shown, Embodiment 2 of this utility model provides a hot-press pre-bonding device for hot-pressing and bonding the above-mentioned graphene composite polyimide film. The device is characterized by comprising: a support bracket 3 with a fixed platform 31 for supporting the graphene composite polyimide film; a plurality of positioning modules 4 disposed on the platform 31 for positioning the graphene composite polyimide film; a pair of first guide rods 5 fixedly disposed on the support bracket 3 along the length direction of the support bracket 3; and a displacement seat 6 movably disposed on the support bracket 3, the displacement seat 6 slidingly engaging with the pair of first guide rods 5. Preferably, the displacement seat 6 is equipped with a displacement sensor to detect the displacement distance of the displacement seat 6 along a pair of first guide rods 5; a driving device (not shown in the figure) is installed on the displacement seat 6 and connected to the bearing bracket 3 to drive the displacement seat 6 to slide along the guide of the pair of first guide rods 5; a hot press plate 7 is movably installed between the table surface 31 and the displacement seat 6 for hot pressing and bonding the graphene composite polyimide film; and a lifting device 8 is fixedly installed on the displacement seat 6, with the actuator of the lifting device 8 connected to the hot press plate 7 to drive the hot press plate 7 to move up and down.

[0070] When the equipment is running, firstly, the drive device drives the displacement seat 6 to slide along the guide of the first guide rod 5 to directly above the graphene composite polyimide film placed on the table 31, so that the hot press plate 7 is aligned with the graphene composite polyimide film. Then, the lifting device 8 drives the hot press plate 7 to descend, so that the heating surface of the hot press plate 7 contacts the graphene composite polyimide film to encapsulate the polyimide film.

[0071] Furthermore, such as Figures 1-5As shown, the positioning module 4 includes: an assembly hole 41, which is formed on the table surface 31; a support housing 42, which is inserted into the assembly hole 41, with the top end of the support housing 42 engaging with the assembly hole 41, and the top surface of the support housing 42 being coplanar with the top surface of the table surface 31; a first positioning component, which is disposed on the support housing 42 and the table surface 31, and is connected to an external air source for positioning the graphene composite polyimide film; a movable plate 43, which is movably disposed in the inner cavity of the support housing 42 along the height direction of the support bracket 3; several support components 45, which are disposed on the outer wall of the support housing 42, and are connected to the movable plate 43 for elastic support of the movable plate 43; several second positioning components 44, which are disposed on the movable plate 43 and the table surface 31 for positioning the graphene composite polyimide film; and a protective housing 47, which is fixedly disposed at the bottom of the movable plate 43, and the protective housing 47 is matched with the positions of the several second positioning components 44.

[0072] Furthermore, such as Figures 1-3 As shown, the second positioning component 44 includes: a receiving hole 441, formed on the top wall of the inner cavity of the supporting housing 42, the receiving hole 441 penetrating the inner wall of the supporting housing 42 and exposed on its top surface; an assembly cylinder 442, fixedly mounted on the movable plate 43, the top port of the assembly cylinder 442 corresponding to the position of the receiving hole 441, and the bottom port of the assembly cylinder 442 exposed on the bottom surface of the movable plate 43; and a plurality of positioning rods 443, movably mounted in the inner cavity of the assembly cylinder 442, each positioning rod 443 being arranged along the axial direction of the assembly cylinder 442, the plurality of positioning rods 443 being circumferentially distributed around the central axis of the assembly cylinder 442, and the top end of each positioning rod 443 penetrating the inner wall of the supporting housing 42 and exposed on its top surface; and a plurality of positioning rods 443 being movably mounted in the inner cavity of the assembly cylinder 442, each positioning rod 443 being circumferentially distributed around the central axis of the assembly cylinder 442, the top end of which passes through the receiving hole 441. The mounting hole 441 protrudes from the top surface of the bearing housing 42. The wall thickness of the positioning rod 443 increases from the bottom end to the top end of the positioning rod 443. The circumferential outer cylindrical surface 4431 of the positioning rod 443 is parallel to the central axis of the mounting hole 441. Several elastic support mechanisms are set on the assembly cylinder 442. The several elastic support mechanisms are respectively connected to several positioning rods 443 for elastic support of several positioning rods 443. The electric telescopic rod 445 is fixedly set on the bottom wall of the inner cavity of the protective housing 47. The support protrusion 446 is fixedly set on the head end of the inner rod of the electric telescopic rod 445. The position of the support protrusion 446 corresponds to the cavity between the several positioning rods 443.

[0073] Furthermore, such as Figure 5As shown, the elastic support mechanism includes: a plurality of first guide holes (not shown in the figure) formed on the outer wall of the assembly cylinder 442, each first guide hole penetrating the outer wall of the assembly cylinder 442 and communicating with the inner cavity of the assembly cylinder 442, the extension direction of the central axis of each first guide hole pointing towards the central axis of the receiving hole 441; a plurality of second guide rods 4441, each movably inserted into the plurality of first guide holes, the head ends of the plurality of second guide rods 4441 being fixedly connected to the positioning rod 443, the tail ends of the plurality of second guide rods 4441 protruding from the outer surface of the assembly cylinder 442 for guiding the positioning rod 443; an assembly protrusion 4442 fixedly disposed at the tail ends of the plurality of second guide rods 4441; and a plurality of first springs 4443 respectively sleeved on the plurality of second guide rods 4441, the two ends of each first spring 4443 being fixedly connected to the assembly protrusion 4442 and the assembly cylinder 442 respectively, for driving the positioning rod 443 to move toward the central axis of the assembly cylinder 442.

[0074] Furthermore, such as Figures 1-4 As shown in Figure 6, the support assembly 45 includes: an assembly notch 451, formed on the side wall of the bearing housing 42, the assembly notch 451 penetrating the outer wall of the bearing housing 42 and communicating with the inner cavity of the bearing housing 42; an assembly housing 452, fixedly disposed on the side wall of the bearing housing 42, the inner cavity of the assembly housing 452 communicating with the assembly notch 451, the axial direction of the assembly housing 452 being parallel to the height direction of the bearing bracket 3; a guide protrusion 453, fixedly disposed on the movable plate 43, the guide protrusion 453 passing through the assembly notch 451 and movably inserted into the inner cavity of the assembly housing 452; and a second guide... A hole (not shown in the figure) is formed on the guide protrusion 453; a third guide rod 454 is fixedly set on the inner wall of the assembly housing 452, the third guide rod 454 is vertically set along the axial direction of the assembly housing 452, the third guide rod 454 is movably inserted into the second guide hole, and is used to guide the guide protrusion 453; a second spring 455 is sleeved on the third guide rod 454, the two ends of the second spring 455 are respectively connected to the guide protrusion 453 and the bottom wall of the inner cavity of the assembly housing 452, and are used to elastically support the guide protrusion 453 to move towards the top wall of the inner cavity of the assembly housing 452.

[0075] Furthermore, such as Figures 1-3As shown, the first positioning component includes: a plurality of positioning suction cups 461, embedded in the top outer wall of the supporting housing 42, with the suction ends of the suction cups exposed on the top surface of the supporting housing 42 for adsorbing and positioning the graphene composite polyimide film; a plurality of air channels (not shown in the figure), embedded in the inner wall of the supporting housing 42, which are respectively connected to the air outlets of the positioning suction cups 461; and an air extraction pipe 462, embedded in the inner wall of the platform 31, for the output of the air extraction pipe 462. The air intake pipe 462 is connected to the air source. The input end of the intake pipe 462 is connected to the output end of several air channels to extract air from the several air channels. The intake pipe 463 is embedded in the inner wall of the tabletop 31. The input end of the intake pipe 463 is exposed on the outer surface of the tabletop 31. The output end of the intake pipe 463 is connected to the input end of several air channels to transmit air into the several air channels. The electrically controlled valve 464 is installed on the intake pipe 463 to regulate the air flow of the intake pipe 463.

[0076] When a user uses this device to thermo-press and encapsulate a graphene composite polyimide film, firstly, the user places the graphene film layer 1 on the table 31, covering the top surface of the supporting housing 42, and allows several positioning rods 443 of each second positioning component 44 to pass through one of the first through holes 11. Then, the electric telescopic rod 445 drives its inner rod to extend, causing the support protrusion to extend from the bottom end of the assembly cavity formed by the several positioning rods 443 into the inner cavity of the assembly cavity. During this process, the assembly protrusion 4442 pushes the several positioning rods 443 to gradually expand outward until the circumferential outer curved surfaces of the several positioning rods 443 all abut against the circumferential edge of the first through hole 11. Next, the graphene film layer 1 is pre-positioned. Then, an external air source draws air from several air channels through the suction pipe 462, allowing outside air to flow into these channels via the positioning suction cups 461 and the air inlet pipe 463. This allows the positioning suction cups 461 to adsorb and position the graphene film covering it. Next, the electric telescopic rod 445 drives its inner rod to retract, using the inner rod to push the support protrusion 446 out of the assembly cavity. Several positioning rods 443, driven by the elastic force of the first spring 4443, move towards the central axis of the receiving hole 441. Finally, the user takes a PI film layer 2 with an adhesive layer and covers it on top of the graphene film layer 1, positioning the adhesive layer... Between the PI film layer 2 and the graphene film layer 1, several positioning rods 443 of each second positioning component 44 pass through one of the second through holes 21. Next, the electric telescopic rod 445 drives its inner rod to extend again, causing the support protrusion to extend from the bottom end of the assembly cavity formed by the several positioning rods 443 into the inner cavity of the assembly cavity. During this process, the assembly protrusion 4442 pushes the several positioning rods 443 to gradually expand outward until the circumferential outer curved surfaces of the several positioning rods 443 all abut against the circumferential edge of the second through hole 21, thus pre-positioning the PI film layer 2. Then, the displacement seat 6 moves along the guide of the first guide rod 5 to the PI film layer 2 under the drive of the driving device. Above, the lifting device 8 drives the hot press plate 7 to press down, using the hot press plate 7 to hot press the PI film layer 2, adhesive layer and graphene film layer 1 located on its lower side. The heat generated by the hot press plate 7 activates the adhesive layer, thereby bonding and fixing the PI film layer 2 onto the graphene film layer 1, thus completing the hot pressing composite of one layer of PI film layer 2 and graphene film layer 1. During the pressing process of the hot press plate 7, after the hot press plate 7 contacts the top of the positioning rod 443, the hot press plate 7 pushes the movable plate 43 down through the positioning rod 443 until the positioning rod 443 retracts into the receiving hole 441, so as to ensure that the heating surface of the hot press plate 7 can hot press the PI film layer 2, adhesive layer and graphene film layer 1 located on its lower side.

[0077] Similarly, when the user hot-presses another PI film layer 2 onto the graphene film layer 1, the user flips the graphene film layer 1 with the PI film layer 2 on one side, so that the PI film layer 2 is located between the graphene film layer 1 and the platform 31. Several positioning rods 443 of each second positioning component 44 pass through one of the second through holes 21 of the PI film layer 2 located on the lower side. The electric telescopic rod 445 drives its inner rod to extend again, causing the support protrusion to extend from the bottom of the assembly cavity formed by the positioning rods 443 into the inner cavity of the assembly cavity. During this process, the assembly protrusion 4442 pushes the positioning rods 443 to gradually expand outwards until the circumferential outer curved surfaces of the positioning rods 443 all abut against the circumferential edge of the second through hole 21, pre-positioning the graphene film layer 1 with the PI film layer 2. Then... An external air source draws air from several air ducts through an air extraction pipe 462, allowing outside air to flow into these air ducts via positioning suction cups 461 and air inlet pipes 463. This allows the positioning suction cups 461 to adsorb and position the PI film layer 2 located on the lower side. After this, the electric telescopic rod 445 drives its inner rod to retract, using the inner rod to push the support protrusion 446 out of the assembly cavity. Several positioning rods 443 move towards the central axis of the receiving hole 441 under the elastic force of the first spring 4443. Then, the user takes another PI film layer 2 with an adhesive layer and covers it on the upper side of the graphene film layer 1, so that the adhesive layer is located between the PI film layer 2 and the graphene film layer 1. Several positioning rods 443 of each second positioning component 44 pass through one of the second through holes 21 of the PI film layer 2 located on the upper side.Next, the electric telescopic rod 445 drives its inner rod to extend again, causing the support protrusion to extend from the bottom of the assembly cavity formed by several positioning rods 443 into the inner cavity of the assembly cavity. During this process, the assembly protrusion 4442 pushes several positioning rods 443 to gradually expand outward until the circumferential outer curved surfaces of several positioning rods 443 all abut against the circumferential edge of the second through hole 21, pre-positioning the graphene film layer 1 with the PI film layer 2. Then, under the drive of the driving device, the displacement seat 6 moves along the guide of the first guide rod 5 to the top of the PI film layer 2, and the lifting device 8 drives the hot press plate 7 to press down, using the hot press plate 7 to heat press the graphene film layer 1 with the PI film layer 2. The lower PI film layer 2, adhesive layer, and graphene film layer 1 are bonded together by the heat generated by the hot press plate 7. The adhesive layer is activated, thus bonding the PI film layer 2 to the graphene film layer 1. This completes the hot-pressing composite of the PI film layer 2 and the graphene film layer 1. During the downward pressing of the hot press plate 7, after the hot press plate 7 contacts the top of the positioning rod 443, the hot press plate 7 pushes the movable plate 43 downward through the positioning rod 443 until the positioning rod 443 retracts into the receiving hole 441. This ensures that the heated surface of the hot press plate 7 can hot-press the PI film layer 2, adhesive layer, and graphene film layer 1 located below it. After hot pressing, the pre-bonding of the graphene film layer 1 is complete.

[0078] After the graphite film layer is pre-attached by hot pressing, the operator uses an electric heating device to manually seal it, so that a pair of PI film layers 2 cover the inner surface of the first through hole 11.

[0079] Above, refer to Figures 1-6 The graphene composite polyimide film and hot-press pre-attachment equipment according to embodiments of the present invention are described, and have the following beneficial effects:

[0080] 1. Embodiment 1 of this utility model effectively improves the phenomenon of residual air bubbles between graphene film layer 1 and PI film layer 2 during the process of hot-pressing a pair of PI film layers 2 onto graphene film layer 1 by opening multiple first through holes 11 on graphene film layer 1 and multiple second through holes 21 on PI film layer 2, thus solving the defects existing in the prior art.

[0081] 2. In Embodiment 2 of this utility model, the positioning module 4 is equipped with multiple sets of second positioning components 44. During the process of hot-pressing and bonding the PI film layer 2 onto the graphene film layer 1, the positioning rods 443 of each set of second positioning components 44 cooperate with the first through hole 11 or the second through hole 21 to achieve pre-positioning of the graphene film layer 1 or the PI film layer 2, thereby improving the processing accuracy of this equipment.

[0082] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0083] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A graphene composite polyimide film, which is composed of a graphene film layer, a pair of PI film layers and a pair of adhesive layers, the graphene film layer is located between the pair of PI film layers, and any one of the adhesive layers is located between the graphene film layer and one of the PI film layers, characterized in that, The graphene film layer is provided with a plurality of first through holes, and the pair of PI film layers are respectively provided with a plurality of second through holes, the plurality of first through holes and the plurality of second through holes provided on the pair of PI film layers are one-to-one corresponding in position. ​ 2. The graphene composite polyimide film according to claim 1, wherein the graphene composite polyimide film has a thickness of 1 to 100 μm. The porosity of the graphene film layer is not greater than 5%.

3. The graphene composite polyimide film according to claim 1, wherein the graphene composite polyimide film has a thickness of 1 to 100 μm. Any one of the first through holes is collinear with the central axes of the pair of second through holes in position, and the aperture of the first through hole is smaller than the aperture of the second through hole.

4. A hot press lamination apparatus for hot press lamination of the graphene composite polyimide film according to any one of claims 1 to 3, characterized by, Comprise: A bearing support is fixedly provided with a table top for bearing the graphene composite polyimide film; A plurality of positioning modules are arranged on the table top for positioning the graphene composite polyimide film; A pair of first guide rods are respectively fixedly arranged on the bearing support along the length direction of the bearing support; A displacement seat is movably arranged on the bearing support and is in sliding connection with the pair of first guide rods; A driving device is arranged on the displacement seat and is connected with the bearing support for driving the displacement seat to slide along the pair of first guide rods; A hot press plate is movably arranged between the table top and the displacement seat for hot pressing and fitting the graphene composite polyimide film; A lifting device is fixedly arranged on the displacement seat, and the execution end of the lifting device is connected with the hot press plate for driving the hot press plate to lift.

5. The hot bar pre-tacking apparatus of claim 4, wherein the hot bar is configured to be moved in a direction transverse to the direction of movement of the substrate. The positioning module comprises: An assembly hole is arranged on the table top; A bearing shell is inserted into the assembly hole, the top end of the bearing shell is clamped with the assembly hole, and the top surface of the bearing shell is coplanar with the top surface of the table top; A first positioning assembly is arranged on the bearing shell and the table top, the first positioning assembly is connected with an external air source for positioning the graphene composite polyimide film; A movable plate is movably arranged in the inner cavity of the bearing shell along the height direction of the bearing support; A plurality of supporting assemblies are arranged on the outer wall of the bearing shell, the plurality of supporting assemblies are connected with the movable plate for elastically supporting the movable plate; A plurality of second positioning assemblies are arranged on the movable plate and the table top for positioning the graphene composite polyimide film; A protective shell is fixedly arranged at the bottom of the movable plate, and the protective shell is matched with the positions of the plurality of second positioning assemblies.

6. The hot bar pre-tacking apparatus of claim 5, wherein the hot bar is configured to be moved in a direction transverse to the direction of movement of the substrate. The second positioning assembly comprises: A receiving hole is arranged on the inner cavity top wall of the bearing shell, and the receiving hole penetrates through the inner wall of the bearing shell and is exposed on the top surface of the receiving hole; An assembly cylinder is fixedly arranged on the movable plate, the top port of the assembly cylinder is matched with the position of the receiving hole, and the bottom port of the assembly cylinder is exposed on the bottom surface of the movable plate; A plurality of positioning rods are movably arranged in the inner cavity of the assembly cylinder, any one of the positioning rods is arranged along the axial direction of the assembly cylinder, the plurality of positioning rods are circumferentially arranged around the central axis of the assembly cylinder, and the top end of any one of the positioning rods protrudes from the top surface of the bearing shell through the receiving hole. A plurality of elastic supporting mechanisms are arranged on the assembly cylinder and connected with the plurality of positioning rods respectively, for elastically supporting the plurality of positioning rods; An electric telescopic rod is fixedly arranged on the inner cavity bottom wall of the protective shell; A supporting bump is fixedly arranged on the head end of the inner rod of the electric telescopic rod, and the supporting bump corresponds to the position of the cavity between the plurality of positioning rods.

7. The hot bar pre-tacking apparatus of claim 6, wherein the hot bar is configured to be moved in a direction transverse to the direction of movement of the substrate. 5 The wall thickness of the positioning rod increases from the bottom end to the top end of the positioning rod, and the circumferential outer cylindrical curved surface of the positioning rod is parallel to the central axis of the accommodating hole.

8. The hot bar prebonding apparatus of claim 6, wherein the hot bar is configured to be moved in a direction transverse to the direction of movement of the substrate. The elastic supporting mechanism comprises: A plurality of first guide holes are arranged on the outer wall of the assembly cylinder, any first guide hole is communicated with the inner cavity of the assembly cylinder through the outer wall of the assembly cylinder, and the extension direction of the central axis of any first guide hole is directed to the central axis of the accommodating hole; A plurality of second guide rods are movably inserted into the plurality of first guide holes respectively, the head end of the second guide rod is fixedly connected with the positioning rod, and the tail end of the second guide rod protrudes from the outer surface of the assembly cylinder, for guiding the positioning rod; An assembly bump is fixedly arranged on the tail end of the second guide rod; A plurality of first springs are sleeved on the plurality of second guide rods respectively, and the two ends of any first spring are fixedly connected with the assembly bump and the assembly cylinder respectively, for driving the positioning rod to move towards the central axis of the assembly cylinder.

9. The hot bar pre-tacking apparatus of claim 5, wherein, The supporting assembly comprises: An assembly gap is arranged on the side wall of the bearing shell, and the assembly gap is communicated with the inner cavity of the bearing shell through the outer wall of the bearing shell; An assembly shell is fixedly arranged on the side wall of the bearing shell, the inner cavity of the assembly shell is communicated with the assembly gap, and the axial direction of the assembly shell is parallel to the height direction of the bearing support; A guide bump is fixedly arranged on the movable plate, and the guide bump is movably inserted into the inner cavity of the assembly shell through the assembly gap; A second guide hole is arranged on the guide bump; A third guide rod is fixedly arranged on the inner wall of the assembly shell, the third guide rod is vertically arranged along the axial direction of the assembly shell, the third guide rod is movably inserted into the second guide hole, and the third guide rod guides the guide bump; A second spring is sleeved on the third guide rod, and the two ends of the second spring are connected with the guide bump and the inner cavity bottom wall of the assembly shell respectively, for elastically supporting the guide bump to move towards the inner cavity top wall of the assembly shell.

10. The hot bar prebonding apparatus of claim 5, wherein the hot bar is configured to be moved in a direction transverse to the direction of movement of the substrate. The first positioning assembly comprises: A plurality of positioning suction cups are embedded in the top outer wall of the bearing shell, the air suction end of the plurality of suction cups is exposed to the top surface of the bearing shell, for adsorbing and positioning the graphene composite polyimide film; A plurality of air flow channels are embedded in the inner wall of the bearing shell, and the plurality of air flow channels are communicated with the air outlet ends of the plurality of positioning suction cups respectively. A suction pipe is embedded in the inner wall of the table top, the output end of the suction pipe is connected with the air source, and the input end of the suction pipe is communicated with the output ends of the air flow channels, so as to suck the air in the air flow channels. An air inlet pipe is embedded in the inner wall of the table top, the input end of the air inlet pipe is exposed to the outer surface of the table top, the output end of the air inlet pipe is communicated with the input ends of the air flow channels, and the air inlet pipe is used for transmitting air into the air flow channels. An electric control valve is arranged on the air inlet pipe and used for adjusting the air flow of the air inlet pipe.

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