CN110267375B - Preparation process of graphene electric heating film and graphene electric heating film - Google Patents
Preparation process of graphene electric heating film and graphene electric heating film Download PDFInfo
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- CN110267375B CN110267375B CN201910555878.4A CN201910555878A CN110267375B CN 110267375 B CN110267375 B CN 110267375B CN 201910555878 A CN201910555878 A CN 201910555878A CN 110267375 B CN110267375 B CN 110267375B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 153
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 153
- 238000005485 electric heating Methods 0.000 title claims abstract description 32
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/03—Electrodes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
- H05B3/145—Carbon only, e.g. carbon black, graphite
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
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- Carbon And Carbon Compounds (AREA)
- Surface Heating Bodies (AREA)
Abstract
The invention discloses a preparation process of a graphene electric heating film and the graphene electric heating film, which comprises the following steps: forming a conductive electrode on the surface of the graphene film; forming a positioning sheet on the surface of the conductive electrode; forming a protective layer on the surface of the graphene film, wherein the conductive electrode and the positioning sheet are both positioned between the graphene film and the protective layer; and positioning through the positioning sheet to form an electrode opening. According to the embodiment of the invention, the electrode opening can be accurately positioned and formed on the graphene electric heating film, and graphene cannot be damaged.
Description
Technical Field
The invention relates to the technical field of graphene, in particular to a preparation process of a graphene electric heating film and the graphene electric heating film.
Background
The electrothermal film is a film capable of heating after being electrified, and is made of conductive special printing ink and metal current carrying strips which are processed and hot-pressed between insulating polyester films. When the electric heating film is in work, the electric heating film is used as a heating body, and heat is sent into a space in a radiation mode, so that the heating purpose is achieved. The graphene electrothermal film is a novel electrothermal film which utilizes a graphene film as a heating material. As a two-dimensional carbon material, the graphene electrothermal film is a surface heating body and is heated uniformly. And the graphene is flexible and transparent, so that the graphene heating film has the same characteristics. Similar to the current electrothermal film structure.
The preparation method of the common electrothermal film comprises the following steps: firstly, forming a conductive electrode on the surface of a substrate, generally adopting copper, aluminum and other metals, then spraying or printing conductive ink on the surface to form a heating layer, drying and then packaging to obtain the electrothermal film. However, this process is not suitable for the graphene transparent heating film, and in the preparation process of the graphene electric heating film, an electrode opening needs to be formed at the conductive electrode for an external electrode, but the common preparation method is easy to scratch the surface of graphene, resulting in damage to graphene.
Disclosure of Invention
The invention provides a preparation process of a graphene electric heating film and the graphene electric heating film, which are used for forming an electrode opening on the graphene electric heating film.
The invention provides a preparation process of a graphene electric heating film, which comprises the following steps: forming a conductive electrode on the surface of the graphene film; forming a positioning sheet on the surface of the conductive electrode; forming a protective layer on the surface of the graphene film, wherein the conductive electrode and the positioning sheet are both positioned between the graphene film and the protective layer; and positioning through the positioning sheet to form an electrode opening.
In one embodiment, the forming of the conductive electrode on the surface of the graphene thin film includes: compounding conductive paste on the graphene film through a printing process; drying the graphene film compounded with the conductive paste to obtain a conductive electrode; and the positioning holes are formed in the conductive slurry compounded on the graphene film, and the positioning sheet is formed on the surface of the conductive electrode by using the positioning holes.
In one embodiment, the forming of the positioning sheet on the surface of the conductive electrode includes: judging whether a positioning hole exists on the conductive electrode; and when the conductive electrode is judged to have the positioning hole, connecting the positioning sheet to the positioning hole.
In one embodiment, the diameter of the positioning hole is smaller than the diameter of the electrode opening.
In one embodiment, the positioning sheet is connected to the conductive electrode through an adhesive, and the protective layer is connected to the graphene film through an adhesive; wherein the viscosity between the positioning sheet and the conductive electrode is smaller than the viscosity between the protective layer and the graphene film.
In one embodiment, the spacer is any one of a non-metal spacer and a metal spacer; wherein, the raw material of the non-metal positioning sheet comprises any one or more of PET material, PI material and PEN material; the raw material of the metal positioning sheet comprises any one or more of copper, aluminum and iron.
In one embodiment, the viscosity of the non-metal positioning sheet is 0-20 g/25mm, and the viscosity of the protective layer is more than 80g/25 mm.
In one implementation mode, the metal positioning sheet is connected to the conductive electrode in a sticky mode through an adhesive, the viscosity of the adhesive is 0-20 g/25mm, and the viscosity of the protective layer is larger than 80g/25 mm.
In one embodiment, the positioning by the positioning sheet to form the electrode opening includes: cutting the protective layer above the positioning sheet by laser; and removing the positioning sheet and the protective layer positioned above the positioning sheet to form an electrode opening.
In another aspect, the present invention provides a graphene electrical heating film, which is manufactured by the manufacturing process of the graphene electrical heating film according to any one of the above embodiments.
In the preparation process of the graphene electric heating film and the graphene electric heating film provided by the invention, the graphene film is protected by the protective layer, the electrode port is positioned by the positioning sheet, and the electrode port is protected when the electrode port is formed, so that the purpose of forming the electrode port on the graphene electric heating film without damaging the graphene and the conductive electrode is achieved, and the method is simple and suitable for large-scale production.
Drawings
Fig. 1 is a schematic structural diagram of a graphene electrical heating film according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an exploded structure of a graphene electrical heating film according to an embodiment of the present invention;
fig. 3 is a first schematic flow chart illustrating a first process for manufacturing a graphene electrical heating film according to an embodiment of the present invention;
fig. 4 shows a second schematic flow chart of a process for preparing a graphene electrical heating film according to an embodiment of the present invention;
fig. 5 is a schematic flow chart showing a third process of manufacturing a graphene electrical heating film according to an embodiment of the present invention;
fig. 6 shows a fourth schematic flow chart of a preparation process of the graphene electrical heating film according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a graphene electrical heating film according to an embodiment of the present invention; fig. 2 is a schematic diagram illustrating an exploded structure of a graphene electrical heating film according to an embodiment of the present invention; fig. 3 is a first schematic flow chart of a process for manufacturing a graphene electrical heating film according to an embodiment of the present invention.
Referring to fig. 1, fig. 2 and fig. 3, in one aspect, an embodiment of the present invention provides a graphene electrical heating film preparation process, including: step 101, forming a conductive electrode 2 on the surface of a graphene film 1; 102, forming a positioning sheet 4 on the surface of the conductive electrode 2; 103, forming a protective layer 5 on the surface of the graphene film 1, wherein the conductive electrode 2 and the positioning sheet 4 are both positioned between the graphene film 1 and the protective layer 5; and 104, positioning by the positioning sheet 4 to form the electrode port 3.
The preparation process provided by the embodiment of the invention aims to realize the purpose of quickly and accurately punching the graphene electric heating film. By forming the positioning pieces 4 on the surface of the conductive electrode 2, the machine can perform precise positioning by the positioning pieces 4, thereby forming the electrode port 3 at the position where the positioning pieces 4 are formed. Electrode mouth 3 that so forms can accurately be located conductive electrode 2 tops, and the skew rate is low, can with conductive electrode 2 complete coincidences to avoid appearing because 3 words of electrode mouth and the partial coincidence of electric electrode or not coincidence and lead to the condition appearance of graphite alkene electric heat membrane defective.
Specifically, in the manufacturing process implemented by the present invention, step 101 is first executed to form the conductive electrode 2 on the surface of the graphene film 1. The graphene film 1 may be a commercially available graphene film 1, or may be prepared by itself. The graphene film 1 includes a substrate and a graphene layer formed on a surface of the substrate. The substrate can be made of an insulating material capable of forming graphene, further, the substrate is made of a flexible material, the graphene film 1 can be rolled, and large-scale production of the graphene electric heating film can be achieved through the roll-to-roll graphene film 1 and the preparation process provided by the embodiment of the invention. In a particular embodiment, the substrate may be a polyester film, such as a PET film, PI film, PEN film, or other polyester film. The method for forming the graphene on the substrate is not limited in the embodiment of the invention, and the chemical vapor deposition method can be adopted to generate the graphene on the substrate. When the graphene film 1 is selected in the embodiment of the invention, the graphene film only needs to comprise a substrate made of an insulating material and a graphene layer compounded on the substrate. In the present invention, the spread area of the graphene layer needs to be equal to or smaller than the spread area of the substrate in order to facilitate the subsequent operation. The conductive electrode 2 is used for conducting electricity to enable the graphene layer to generate heat when electrified. The embodiment of the invention does not limit the mode of forming the conductive electrode 2 on the surface of the graphene film 1, and only needs that the conductive electrode 2 can be compounded on the surface of the graphene film 1 to be contacted with the graphene film 1, and the conductive electrode 2 conducts electricity to enable the graphene to heat under the electrified condition. The specific material of the conductive electrode 2 in the embodiment of the present invention is limited, any conductive metal may be adopted, and preferably, the conductive silver paste is adopted, and when the conductive electrode 2 is formed on the surface of the graphene film 1 in a conductive paste manner, drying is required to form the conductive electrode 2 from the conductive paste. In step 101, after forming the conductive electrode 2 on the surface of the graphene film 1, step 102 is executed to form the positioning sheet 4 on the surface of the conductive electrode 2. In this step, the diameter of the positioning sheet 4 needs to be smaller than the width of the conductive electrode 2, so that the positioning sheet 4 can be completely disposed above the conductive electrode 2, i.e., the periphery of the positioning sheet 4 is not in contact with the graphene film 1. In the embodiment of the invention, the positioning sheet 4 can be directly placed on the conductive electrode 2 between the positioning sheet 4 and the conductive electrode 2, the positioning sheet 4 can be bonded on the conductive electrode 2 through an adhesive, and the positioning sheet 4 can be bonded on the conductive electrode 2 through the adhesion of the positioning sheet 4. The embodiment of the invention does not limit the connection mode between the positioning sheet 4 and the conductive electrode 2, and only needs the positioning sheet 4 to position the position on the conductive electrode 2.
In step 103, forming a protective layer 5 on the surface of the graphene film 1; the conductive electrode 2 and the positioning sheet 4 are both positioned between the graphene film 1 and the protective layer 5. The protective layer 5 is formed on the surface of the graphene by adhesion, and the purpose of the protective layer 5 is to protect the graphene film 1. Therefore, in order to enable the protection effect of the protection layer 5 on the graphene film 1 to be good, the protection layer 5 needs to be fixed on the surface of the graphene film 1 by using an adhesive with a large viscosity, so that the protection layer 5 can keep moving synchronously with the graphene film 1, and the graphene layer is prevented from falling off from the graphene film 1 due to friction between the protection layer 5 and the graphene film 1. Specifically, the protective layer 5 can be selected to be an insulating material the same as the base material, such as a PET film, a PI film, a PEN film or other polyester films, and when the substrate and the protective layer 5 belong to the same material, the deformation amounts of the substrate and the protective layer are the same, so that the graphene electric heating film can be prevented from deforming and deteriorating when deforming, and the protective effect of the protective layer 5 on the graphene film 1 is better. Based on the fact that the graphene film 1 has two conditions that the area of the base layer is consistent with that of the graphene layer and the area of the base layer crossed with the graphene layer is large, the forming modes of the protective layer 5 are different. When basic unit and graphite alkene layer area unanimous, protective layer 5 is on graphite alkene layer surface through bonding connection, then adopts laser insulation or other insulating mode to expose at the graphite alkene layer at edge and carry out insulation treatment to reach the purpose of encapsulation protection graphite alkene layer. When the area of basic unit is greater than the area on graphite alkene layer, with protective layer 5 through bonding connection on graphite alkene layer's surface, simultaneously, protective layer 5's periphery is connected on basic unit to bond through basic unit and protective layer 5 and encapsulate graphite alkene layer between basic unit and protective layer 5. Then, step 104 is performed to position the electrode port 3 by the positioning piece 4. Specifically, the original positioning point position can be exposed on the protective layer 5 by peeling off the positioning sheet 4 and the protective layer 5 located above the positioning sheet 4, so as to form the electrode opening 3.
By combining the technical scheme, the preparation method provided by the embodiment of the invention can accurately form the electrode port 3 on the graphene electric heating film, avoid the electrode port 3 from deviating, improve the yield of the graphene electric heating film, and according to experiments, the method is used for forming the electrode port 3 on the graphene electric heating film, and the success rate of the method reaches 99.9%.
Fig. 4 shows a second flow chart of a preparation process of a graphene electrical heating film according to an embodiment of the present invention.
Referring to fig. 4, in the embodiment of the present invention, step 101, forming a conductive electrode 2 on a surface of a graphene film 1 includes: step 1011, compounding the conductive paste on the graphene film 1 through a printing process; step 1012, drying the graphene film 1 compounded with the conductive paste to obtain a conductive electrode 2; wherein, the conductive paste compounded on the graphene film 1 is provided with a positioning hole, and the positioning sheet 4 is formed on the surface of the conductive electrode 2 by using the positioning hole.
In the embodiment of the present invention, the positioning sheet 4 needs to be accurately disposed above the conductive electrode 2, and the positioning accuracy of the positioning sheet 4 relative to the conductive electrode 2 affects the position accuracy of the final electrode opening 3. In order to enable the positioning plate 4 to be accurately positioned. In the embodiment of the invention, when the conductive electrode 2 is formed on the surface of the graphene film 1, the conductive paste is compounded on the graphene film 1 through the printing process in step 1011. The printing process specifically comprises the step of printing the conductive paste on the roll-to-roll graphene film 1 through a roll-to-roll screen printing machine. When adopting printing process, the concrete printing shape of electrically conductive thick liquids when can controlling electrically conductive thick liquids to print on graphite alkene film 1 so set up, can be when setting up the concrete printing shape of electrically conductive thick liquids, remain a locating hole on predetermineeing the printing shape to supply spacer 4 to fix a position. Specifically, the diameter of the positioning hole is smaller than that of the positioning sheet 4. For example, in one embodiment, the conductive electrode 2 is 5mm, the spacer 4 is 3mm, and the alignment hole is 1 mm. And then drying the conductive paste to form the conductive electrode 2 which is beneficial to the installation of the positioning sheet 4.
Fig. 5 is a schematic flow chart showing a third process of preparing a graphene electrical heating film according to an embodiment of the present invention.
Referring to fig. 5, in the embodiment of the present invention, step 102, forming a positioning sheet 4 on the surface of the conductive electrode 2 includes: step 1021, judging whether a positioning hole exists on the conductive electrode 2; and step 1022, when the conductive electrode 2 is judged to have the positioning hole, connecting the positioning sheet 4 on the positioning hole.
In the embodiment of the invention, different from the conductive electrode 2 without the positioning hole, when the conductive electrode 2 is provided with the positioning hole, the embodiment of the invention can adopt a CCD visual recognition system to recognize the positioning hole, or adopt other target systems to recognize the positioning hole, and utilize the target systems to recognize the positioning hole, so that a machine can determine the position of the positioning hole, thereby accurately pasting the positioning sheet 4 on the positioning hole, further realizing the purpose of accurately arranging the positioning sheet 4 on the conductive electrode 2, further being beneficial to the formation of the subsequent electrode port 3, and enabling the formation position of the electrode port 3 to be more accurate. Meanwhile, the positioning of the target system is utilized, the positioning sheet 4 can be arranged to be attached to the conductive electrode 2 through an automatic chip mounter or other equipment with an automatic chip mounting function, manual operation is not needed due to the fact that the automatic chip mounter with the target system or other equipment with the automatic chip mounting function is adopted, efficiency in the positioning hole attaching process is improved, accordingly, efficiency of preparing the whole graphene electric heating film is improved, and large-scale production is facilitated.
In the embodiment of the present invention, the diameter of the positioning hole is smaller than that of the positioning sheet 4.
When the positioning sheet 4 is attached to the positioning hole, it should be noted that the positioning sheet 4 needs to be connected to the conductive electrode 2, and in order to position the deviation of the positioning sheet 4 caused by the deviation of the center of the positioning hole, the diameter of the positioning hole is smaller than the diameter of the positioning sheet 4, specifically, the diameter of the positioning hole is preferably 0.1-3mm, and the diameter of the positioning sheet is larger than the diameter of the positioning hole by 1-8 mm.
In the embodiment of the invention, the positioning sheet 4 is connected to the conductive electrode 2 through viscosity, and the protective layer 5 is connected to the graphene film 1 through viscosity; the viscosity between the positioning sheet 4 and the conductive electrode 2 is smaller than the viscosity between the protective layer 5 and the graphene film 1.
In order to stably dispose the positioning sheet 4 on the surface of the conductive electrode 2 in step 102 and avoid displacement of the positioning sheet 4 in the subsequent process, in the embodiment of the invention, the positioning sheet 4 is preferably connected to the surface of the conductive electrode 2 through adhesion, and the adhesion connection may be through adhesive bonding, or the positioning sheet 4 is made of an adhesive material, so that the positioning sheet 4 itself has adhesion. And the protective layer 5 is also arranged on the surface of the graphene film 1 in a sticky connection manner. In the later process, the positioning sheet 4 needs to be taken out to form the electrode port 3, so that the viscosity between the positioning sheet 4 and the conductive electrode 2 needs to be small in order to remove the positioning sheet 4 conveniently; since the protective layer 5 is used to protect the graphene thin film 1, in order to prevent relative movement between the protective layer 5 and the graphene thin film 1, the adhesiveness between the protective layer 5 and the graphene thin film 1 needs to be large. Therefore, the adhesiveness between the positioning sheet 4 and the conductive electrode 2 is smaller than the adhesiveness between the protective layer 5 and the graphene film 1.
In the embodiment of the invention, the positioning plate 4 is any one of a non-metal positioning plate 4 and a metal positioning plate 4; wherein, the raw material of the non-metal positioning sheet 4 comprises any one or more of PET material, PI material and PEN material; the metal positioning plate 4 is made of any one or more of copper, aluminum and iron.
Meanwhile, because the positioning sheet 4 needs to be removed subsequently, the positioning sheet 4 in the embodiment of the invention can be selected as the metal positioning sheet 4 or the nonmetal positioning sheet 4, and only the positioning sheet 4 is not left on the surface of the conductive electrode 2 after being taken out. Similarly, the material of the positioning plate 4 is not limited in the embodiment of the present invention, but it is required that the positioning plate 4 does not affect the protective effect of the protective layer 5 and the conductive effect of the conductive electrode 2 when the positioning plate 4 is not taken out, that is, the positioning plate 4 is preferably made of a non-corrosive material.
In the embodiment of the invention, the viscosity of the non-metal positioning sheet 4 is 0-20 g/25mm, and the viscosity of the protective layer 5 is more than 80g/25 mm.
Specifically, when the spacer 4 is selected to nonmetal spacer 4, it can select itself to have sticky resin and make, and the viscosity of the nonmetal spacer 4 of last shaping need be located between 0 ~ 20g/25mm, so sets up, and when getting rid of spacer 4, the viscidity of spacer 4 does not exist to the less setting of electrically conductive electrode 2's damage, so, has avoided destroying electrically conductive electrode 2 when spacer 4 takes out. When the positioning sheet 4 is a non-adhesive sheet, an adhesive may be applied to the surface of the positioning sheet 4 connected to the conductive electrode 2, so that the non-metallic positioning sheet 4 is connected to the conductive electrode 2 with adhesion.
And the viscosity of protective layer 5 needs to be greater than 80g/25mm, so set up, when carrying out spacer 4 and take out, protective layer 5 still firmly bonds on graphite alkene film 1 and the electrically conductive electrode 2 surface of not connecting spacer 4, and can not appear relative movement between protective layer 5, graphite alkene film 1 and electrically conductive electrode 2, has played the purpose of protection graphite alkene film 1 and electrically conductive electrode 2.
In the embodiment of the invention, the metal positioning sheet 4 is connected to the conductive electrode 2 through the adhesive in a sticky manner, the viscosity of the adhesive is 0-20 g/25mm, and the viscosity of the protective layer 5 is more than 80g/25 mm.
In the embodiment of the present invention, since the metal positioning plate 4 itself has no viscosity, an adhesive may be coated on a surface thereof connected to the conductive electrode 2, so that the metal positioning plate 4 has viscosity to be connected to the conductive electrode 2.
And the viscosity of protective layer 5 needs to be greater than 80g/25mm, so set up, when carrying out spacer 4 and take out, protective layer 5 still firmly bonds on graphite alkene film 1 and the electrically conductive electrode 2 surface of not connecting spacer 4, and can not appear relative movement between protective layer 5, graphite alkene film 1 and electrically conductive electrode 2, has played the purpose of protection graphite alkene film 1 and electrically conductive electrode 2.
Fig. 6 shows a fourth schematic flow chart of a preparation process of the graphene electrical heating film according to an embodiment of the present invention.
Referring to fig. 6, in the embodiment of the present invention, step 104, positioning by the positioning sheet 4, forms the electrode opening 3, including: step 1041, cutting the protective layer 5 above the positioning sheet 4 by laser; in step 1042, the spacers 4 and the passivation layer 5 on the spacers 4 are removed to form the electrode opening 3.
Specifically, in the process of forming the electrode opening 3 according to the embodiment of the present invention, the protective layer 5 located above the positioning plate 4 needs to be cut by laser, and since the cutting portion is the protective layer 5 located above the positioning plate 4, the positioning plate 4 can protect the conductive electrode 2 located below the positioning plate, so as to prevent the conductive electrode 2 from being damaged due to too deep laser cutting, so that the power of laser has a wider selection range when laser cutting is performed. The embodiment of the invention does not limit the shape of the positioning sheet 4 cut by laser, and the cutting shape can be determined to be a straight line shape, a cross shape or a round shape matched with the edge of the positioning sheet 4 according to the difficulty of taking out the positioning sheet 4 and stripping the protective layer 5 positioned above the positioning sheet 4, wherein the cutting shape is preferably a round hole concentrically arranged with the positioning sheet 4, when the laser cutting shape is set to be the round hole, the aperture of the round hole formed by laser punching is 1-5mm larger than the positioning hole, and the diameter of the positioning sheet is 0-3mm larger than the laser punching, preferably 1-3 mm.
When carrying out laser cutting, can adopt CCD vision identification system or adopt other target systems to discern spacer 4 equally to improve the accurate nature of cutting, specifically, can adopt the laser cutting equipment that has target system to accomplish the cutting to protective layer 5. After the protective layer 5 on the positioning plate 4 is cut, step 1042 is performed to remove the positioning plate 4 and the protective layer 5 on the positioning plate 4, and form the electrode opening 3. The positioning piece 4 and the protective layer 5 on the positioning piece 4 may be removed manually by a tweezers or a suction cup, or may be removed by a machine.
To facilitate an understanding of the above embodiments, specific examples are provided below for the purpose of illustration.
Example 1
Firstly, printing a conductive silver paste electrode with a width of 7mm and a length of 230mm on a graphene film 1 coiled material by using a roll-to-roll screen printing machine, and drying and laser processing the conductive silver paste electrode through a drying tunnel to form a conductive electrode 2.
Then, a thin disc of low viscosity PI having a diameter of 6 mm, a thickness of 50 μm and a viscosity of 3g/25mm was applied on the conductive electrode 2.
And then, coating a PEN (PEN-open polyethylene) adhesive film with the thickness of 150 microns and the viscosity of 80g/25mm on the surface of the graphene film 1 stuck with the low-viscosity PI thin wafer by using a roll-to-roll film coating process. The conductive electrode 2 and the PI thin wafer are located between the graphene film 1 and the PEN adhesive film.
And then, positioning and identifying the circle center position of the PI thin wafer by using a CCD (charge coupled device), and emitting laser capable of cutting off the glue film, wherein the laser power is set to be 1.5w, and cutting out concentric circles with the diameter of 5.5 mm.
And then, manually removing the PEN film and the PI thin wafer which are concentric circles and have the diameter of 5.5 millimeters by using a forceps or a sucker tool, and exposing the electrode port 3 to obtain the graphene electric heating film.
And finally, according to the size requirement, accurately aligning and cutting out the product of the graphene heating film by using a CCD aligning and cutting machine.
The thicknesses of the PI thin circular sheet and the PEN adhesive film are both 0.005 mm-1 mm, the thicknesses of the preferred PI thin circular sheet and the PEN adhesive film are both 0.010 mm-0.5 mm, and no correlation exists between the thicknesses of the PI thin circular sheet and the PEN adhesive film.
Example 2
Firstly, printing a conductive silver paste electrode with a width of 7mm and a length of 230mm on a graphene film 1 coiled material by using a roll-to-roll screen printing machine, and drying and laser processing the conductive silver paste electrode through a drying tunnel to form a conductive electrode 2.
Then, a thin disc of low viscosity PET of 5mm in diameter, 5 μm in thickness and 10g/25mm in viscosity was applied to the conductive electrode 2.
And then, covering a 10-micron PEN film with the viscosity of 90g/25mm on the surface of the graphene film 1 adhered with the thin wafer by using a roll-to-roll film covering process, positioning and identifying the position of the thin wafer by using a CCD (charge coupled device), and shooting laser which can just cut off the film, wherein the laser power is 1.2w, and cutting out concentric circles with the diameter of 5 mm.
Then, the PET thin wafer and the adhesive film on the PET thin wafer are manually removed by using a tool such as tweezers or a suction cup, and the electrode port 3 is exposed, so that the graphene electric heating film is obtained.
And finally, according to the size requirement, accurately aligning and cutting out the graphene heating film product by using a CCD aligning and cutting machine.
The thicknesses of the PET thin circular sheet and the PEN adhesive film are both 0.005 mm-1 mm, the thicknesses of the preferable PET thin circular sheet and the preferable PEN adhesive film are both 0.010 mm-0.5 mm, and no correlation exists between the thicknesses of the PET thin circular sheet and the PEN adhesive film.
Example 3
Firstly, printing a conductive silver paste electrode with the width of 7mm and the length of 230mm on a graphene film 1 coiled material by using a roll-to-roll screen printing machine, and drying and laser processing through a drying tunnel to obtain a conductive electrode 2.
Then, a thin disc of low viscosity PEN with a diameter of 6 mm, a thickness of 100 μm and a viscosity of 20g was applied on the conductive electrode 2.
Then, a PET film with the thickness of 500 microns and the viscosity of 100g is coated on the surface of the graphene film 1 attached with the thin wafer by using a roll-to-roll film coating process, then the position of the thin wafer is identified by using CCD positioning, laser which can just cut off the film is shot, the laser power is 4.5w, and concentric circles with the diameter of 5mm are cut.
And then, manually removing the PEN thin wafer and the PET film positioned on the PEN thin wafer by using tools such as tweezers or a sucker, and the like, and simultaneously exposing the electrode port 3 to obtain the graphene electric heating film.
And finally, according to the size requirement, accurately aligning and cutting out the graphene heating film product by using a CCD aligning and cutting machine.
The thickness of the PEN thin wafer and the thickness of the PET film are both 0.005 mm-1 mm, the thickness of the preferred PEN thin wafer and the thickness of the preferred PET film are both 0.010 mm-0.5 mm, and no correlation exists between the thicknesses of the PEN thin wafer and the PET film.
Example 4
Firstly, printing a conductive silver paste electrode with the width of 7mm and the length of 230mm on a graphene film 1 coiled material by using a roll-to-roll screen printing machine, and drying and laser processing through a drying tunnel to form a conductive electrode 2.
Then, a copper thin wafer is placed on the conductive electrode 2, and then a PET film is coated on the surface of the graphene film 1 attached with the copper thin wafer by using a roll-to-roll film coating process.
Then, a laser beam was emitted from the electrode port 3 with a CCD positioning and a laser power of 9w, and concentric circles having the same diameter as the copper thin wafer were cut.
And then blowing away the copper thin wafer and the PET film positioned above the copper thin wafer by adopting compressed air to expose the conductive electrode 2, thereby obtaining the graphene electric heating film.
And finally, accurately aligning and cutting out the graphene heating film product by using a CCD (charge coupled device) alignment cutting machine according to the size requirement.
The thicknesses of the copper thin wafer and the PET adhesive film are both 0.005 mm-1 mm, the thicknesses of the preferable copper thin wafer and the preferable PET adhesive film are both 0.010 mm-0.5 mm, and no correlation exists between the thicknesses of the copper thin wafer and the PET adhesive film.
Example 5
Firstly, printing a conductive silver paste electrode with the width of 7mm and the length of 230mm on a graphene film 1 coiled material by using a roll-to-roll screen printing machine, wherein the conductive silver paste electrode is rectangular, holes with the diameter of 1mm are formed at two end parts of the conductive silver paste electrode, and drying and laser processing are carried out through a drying tunnel to form the conductive electrode 2 with the holes at two ends.
Then, an automatic chip mounter with CCD positioning is used, the position of the hole is positioned by the CCD, a copper thin wafer with the diameter of 5mm is placed on the center of the hole by the aid of the machine, and then a PET film is coated on the surface of the graphene film 1 with the thin wafer by means of a roll-to-roll film coating process.
Then, a laser beam was emitted at an electrode port 3 with a CCD position, and a concentric circle having a diameter of 3mm was cut out with a laser power of 9 w.
And then blowing away the copper thin wafer and the PET film positioned above the copper thin wafer by adopting compressed air to expose the conductive electrode 2, thereby obtaining the graphene electric heating film.
And finally, accurately aligning and cutting out the graphene heating film product by using a CCD (charge coupled device) alignment cutting machine according to the size requirement.
The thicknesses of the copper thin wafer and the PET adhesive film are both 0.005 mm-1 mm, the thicknesses of the preferable copper thin wafer and the preferable PET adhesive film are both 0.010 mm-0.5 mm, and no correlation exists between the thicknesses of the copper thin wafer and the PET adhesive film.
In another aspect, the present invention provides a graphene electrical heating film, where the graphene electrical heating film is manufactured by any one of the above processes for manufacturing a graphene electrical heating film.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A preparation process of a graphene electric heating film is characterized by comprising the following steps:
forming a conductive electrode on the surface of the graphene film;
forming a positioning sheet on the surface of the conductive electrode;
forming a protective layer on the surface of the graphene film, wherein the conductive electrode and the positioning sheet are both positioned between the graphene film and the protective layer;
positioning through the positioning sheet, and cutting the protective layer positioned above the positioning sheet through laser;
and removing the positioning sheet and the protective layer positioned above the positioning sheet to form an electrode opening.
2. The preparation process according to claim 1, wherein the forming of the conductive electrode on the surface of the graphene film comprises:
compounding conductive paste on the graphene film through a printing process;
drying the graphene film compounded with the conductive paste to obtain a conductive electrode;
and the positioning holes are formed in the conductive slurry compounded on the graphene film, and the positioning sheet is formed on the surface of the conductive electrode by using the positioning holes.
3. The manufacturing process according to claim 2, wherein the forming of the positioning sheet on the surface of the conductive electrode comprises:
judging whether a positioning hole exists on the conductive electrode;
and when the conductive electrode is judged to have the positioning hole, connecting the positioning sheet to the positioning hole.
4. The process of claim 2, wherein the diameter of the locating hole is smaller than the diameter of the electrode opening.
5. The manufacturing process according to claim 1, wherein the positioning sheet is connected to the conductive electrode by adhesion, and the protective layer is connected to the graphene film by adhesion; wherein the viscosity between the positioning sheet and the conductive electrode is smaller than the viscosity between the protective layer and the graphene film.
6. The manufacturing process according to claim 1, wherein the spacer is any one of a non-metal spacer and a metal spacer;
wherein,
the raw materials of the non-metal positioning sheet comprise any one or more of PET materials, PI materials and PEN materials;
the raw material of the metal positioning sheet comprises any one or more of copper, aluminum and iron.
7. The preparation process of claim 6, wherein the viscosity of the non-metal positioning sheet is 0-20 g/25mm, and the viscosity of the protective layer is more than 80g/25 mm.
8. The preparation process of claim 6, wherein the metal positioning sheet is adhesively connected to the conductive electrode through an adhesive, the viscosity of the adhesive is 0-20 g/25mm, and the viscosity of the protective layer is greater than 80g/25 mm.
9. A graphene electrical heating film, wherein the graphene electrical heating film is prepared by the preparation process of the graphene electrical heating film according to any one of claims 1 to 8.
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| CN110993186A (en) * | 2019-10-21 | 2020-04-10 | 珠海烯蟀科技有限公司 | Method for using conducting strip as graphene layer power supply electrode |
| CN110944414A (en) * | 2019-10-21 | 2020-03-31 | 珠海烯蟀科技有限公司 | Microcrystalline glass or mica sheet heating device and electrode connection method thereof |
| CN110933786A (en) * | 2019-12-20 | 2020-03-27 | 烯旺新材料科技股份有限公司 | Transparent graphite alkene electric plate |
| CN111417222B (en) * | 2020-05-07 | 2024-04-09 | 佛山市新豪瑞科技有限公司 | Laser sintering film forming assembly line of graphene electric heating body and production method |
| CN111556597A (en) * | 2020-05-27 | 2020-08-18 | 安徽宇航派蒙健康科技股份有限公司 | Method for preparing graphene heating film for battery on surface of polyimide insulating substrate |
| CN113242616B (en) * | 2020-07-07 | 2022-08-05 | 安徽宇航派蒙健康科技股份有限公司 | Method for preparing graphene high-temperature electrothermal film based on LIG method |
| CN113543383B (en) * | 2021-07-30 | 2023-03-28 | 东风商用车有限公司 | Heating pad and manufacturing method thereof |
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