CN110933789A - Flexible washable graphene heating sheet, preparation method thereof and silver paste material - Google Patents
Flexible washable graphene heating sheet, preparation method thereof and silver paste material Download PDFInfo
- Publication number
- CN110933789A CN110933789A CN201911366881.8A CN201911366881A CN110933789A CN 110933789 A CN110933789 A CN 110933789A CN 201911366881 A CN201911366881 A CN 201911366881A CN 110933789 A CN110933789 A CN 110933789A
- Authority
- CN
- China
- Prior art keywords
- coating
- graphene heating
- negative electrode
- positive electrode
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 187
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 173
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 173
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 83
- 239000004332 silver Substances 0.000 title claims abstract description 83
- 239000000463 material Substances 0.000 title claims description 28
- 238000002360 preparation method Methods 0.000 title claims description 11
- 238000000576 coating method Methods 0.000 claims abstract description 174
- 239000011248 coating agent Substances 0.000 claims abstract description 172
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000002265 prevention Effects 0.000 claims abstract 2
- 239000010408 film Substances 0.000 claims description 95
- 238000007639 printing Methods 0.000 claims description 61
- 239000002245 particle Substances 0.000 claims description 32
- 229920006267 polyester film Polymers 0.000 claims description 22
- 238000000605 extraction Methods 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 12
- 229920002554 vinyl polymer Polymers 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 11
- 230000000996 additive effect Effects 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 9
- 239000010439 graphite Substances 0.000 claims description 9
- -1 graphite alkene Chemical class 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 8
- 239000010409 thin film Substances 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 230000001680 brushing effect Effects 0.000 claims 1
- 238000005406 washing Methods 0.000 description 28
- 238000012360 testing method Methods 0.000 description 27
- 239000000047 product Substances 0.000 description 15
- 239000010410 layer Substances 0.000 description 12
- 239000012528 membrane Substances 0.000 description 10
- 238000002474 experimental method Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000009423 ventilation Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000010030 laminating Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 210000002489 tectorial membrane Anatomy 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 239000013039 cover film Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000002968 anti-fracture Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- 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
- H05B3/36—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heating conductor embedded in insulating material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/206—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
Landscapes
- Surface Heating Bodies (AREA)
- Resistance Heating (AREA)
Abstract
The heating sheet comprises an insulating carrier film, a hydrophobic silver paste coating printed on the carrier film, a hydrophilic graphene heating coating printed on the carrier film and an insulating film pressed on the carrier film. The waterproof coating covers the hydrophilic graphene heating coating and the hydrophobic silver paste coating, and the insulating coating film is attached to the waterproof coating. The graphene heating sheet provided by the invention has folding resistance and water splashing prevention.
Description
Technical Field
The invention relates to the technical field of graphene heating, in particular to a flexible washable graphene heating sheet, a preparation method thereof and a silver paste material.
Background
Graphite alkene generates heat for coil resistor generates heat and chemical reaction heater, more is fit for human use, and more thin and easily attached use and carrying simultaneously. The existing graphene heating sheet technology and product in the market have the problem that the graphene heating sheet cannot be washed and kneaded. The other type is the separation design of the graphene film, the connection of an external converging line and a surface covering film are all assembled, and the products manufactured by the prior art have the problems of incapability of rubbing and washing, because the FPC soft board base material is not soft enough, the resistance of the copper foil used as an electrode can be changed after rubbing, even the line is broken, abnormal heating and non-heating phenomena occur during use, and even the risk of local ignition burning materials and people exists. Or, a gap is generated due to the assembly of the separate member, resulting in poor waterproofness. Therefore, the graphene heater cannot be generally used on clothes and other wearable products needing water washing at a key technical pain point of the prior art.
The invention discloses a copper-plated and etched graphene heating sheet, which is taught in Chinese patent publication No. CN110177402A and discloses a graphene electric blanket, wherein the bottom layer is an anti-slip layer, the surface layer is a decorative layer, a heating sheet is laid between the bottom layer and the surface layer, the heating sheet comprises an upper layer of insulating cloth, a lower layer of insulating cloth and a middle layer of graphene heating sheet, the graphene heating sheets are distributed at intervals, copper leads are fixed on the left side and the right side of the graphene heating sheet, the graphene heating sheets are distributed at intervals, and the graphene heating sheets and the copper leads are bonded in the upper layer of insulating cloth and the lower layer of insulating cloth; the copper wire is used for connecting with a power line.
The invention discloses a combined graphene heater with a graphene film separation design, which is taught in Chinese patent publication No. CN107396468A and discloses a far infrared heating module, comprising: the graphene heating membrane comprises a first surface and a second surface; the front plate is arranged on the first surface and provided with a hollow part; the blank holder strip is arranged at the edge of the second surface; the graphene heating membrane is fixed by the front plate and the edge pressing strip; the graphene heating membrane comprises a single-layer or multi-layer graphene membrane and parallel strip-shaped electrodes arranged at two opposite edges of the graphene membrane, and the graphene membrane and the parallel strip-shaped electrodes are clamped between two insulating films.
Disclosure of Invention
The invention mainly aims to provide a flexible washable graphene heating sheet, which can solve the problem that the graphene heating sheet cannot be washed and kneaded, and has a huge market prospect.
The invention mainly aims to provide a preparation method of the flexible washable graphene heating sheet, which is used for preparing the washable and rubbing-resistant graphene heating sheet.
The invention mainly aims to provide a silver paste material which can be applied to a hydrophobic silver paste coating of a graphene heating sheet.
The main purpose of the invention is realized by the following technical scheme:
the utility model provides a flexible graphite alkene that can wash generates heat piece, includes:
an insulating carrier film having a printing surface;
the hydrophobic silver paste coating is printed and formed on the printing surface of the insulating carrier film and comprises a positive electrode pattern and a negative electrode pattern which are not directly electrically connected with each other, the positive electrode pattern is integrally formed with a plurality of positive electrode wires and a first bus bar connected with the positive electrode wires, the negative electrode pattern is integrally formed with a plurality of negative electrode wires and a second bus bar connected with the negative electrode wires, and the positive electrode wires and the negative electrode wires are arranged in an equidistant staggered manner;
the hydrophilic graphene heating coating is printed on the printing surface of the insulating carrier film, is positioned between the first bus bar and the second bus bar and covers the thin film part between the positive electrode wire and the negative electrode wire;
a waterproof coating printed on the printing surface of the insulating carrier film, the waterproof coating covering the hydrophilic graphene heating coating, the first bus bar and the second bus bar, the waterproof coating having a relatively flat bonding surface, and
the insulating covering film is attached to the attaching surface of the waterproof coating;
specifically, the graphene heating sheet can have folding endurance and water repellency.
Through adopting above-mentioned basic technical scheme one whole, utilize hydrophobic nature silver thick liquid coating with hydrophilic graphite alkene generates heat the coating printing and forms the printing face of insulating carrier film is with again insulating tectorial membrane laminate in waterproof coating, hydrophobic nature silver thick liquid coating with can not produce the cracked risk of structure and electrical property because both materials mix each other or permeate between the hydrophilic graphite alkene generates heat the overlapping pattern of coating on the same side because of both materials, and waterproof coating provides for having two coatings on the binding face that the printing face is more flat, makes insulating tectorial membrane more closely knit laminating, inside has integrated positive negative electrode and busbar graphite alkene generates heat the piece and has folding endurance and prevent water splashing nature.
The present invention in a preferred example may be further configured to: the hydrophilic graphene heating coating also covers the positive electrode wire and the negative electrode wire, and preferably, the line gap between the adjacent positive electrode wire and the negative electrode wire is 0.4-1.2 cm; preferably, the arrangement of the positive electrode lines and the negative electrode lines is linear and staggered, and gaps are respectively formed between the hydrophilic graphene heating coating and the first bus bar and between the hydrophilic graphene heating coating and the second bus bar.
By adopting the preferable technical scheme, the hydrophilic graphene heating coating is used for covering the positive electrode wire and the negative electrode wire, the contact area between the hydrophilic graphene heating coating and the positive electrode wire/the negative electrode wire can be increased, heating air connection is avoided, the heating of a low-voltage small-area module can be realized by using a line gap between the adjacent positive electrode wire and the negative electrode wire which is 0.4-1.2 cm, the block resistance value of the hydrophilic graphene heating coating can be accurately defined by using the linearly staggered positive electrode wire and the negative electrode wire, and the heating of a short-path resistance from the bus bar to the adjacent electrode can be avoided by using the gap between the hydrophilic graphene heating coating and the bus bars on two sides.
The present invention in a preferred example may be further configured to: the positive electrode pattern further includes a lead-out positive electrode integrally connected to the first bus bar and exposed to the insulating coating film, and the negative electrode pattern further includes a lead-out negative electrode integrally connected to the second bus bar and exposed to the insulating coating film.
By adopting the preferable technical scheme, the extraction of the positive electrode and the negative electrode on one side of the membrane is realized by utilizing the extraction positive electrode and the extraction negative electrode, and the heating area with the hydrophilic graphene heating coating can be completely sealed.
The present invention in a preferred example may be further configured to: the extraction positive electrode and the extraction negative electrode are provided with riveting hole structures, and preferably, the extraction positive electrode and the extraction negative electrode of each electrode are respectively provided with two or more riveting holes.
By adopting the preferable technical scheme, the waterproof external electric connection of the graphene heating sheet is realized by utilizing the lead-out positive electrode and the lead-out negative electrode of the riveting hole structure, and preferably, each lead-out electrode is provided with two or more riveting holes, so that the stability of the external electric connection can be improved.
The present invention in a preferred example may be further configured to: the leading positive electrode and the leading negative electrode are connected to the flexible circuit board through ACF conductive adhesive.
By adopting the preferable technical scheme, the lead-out positive electrode and the lead-out negative electrode are connected to the flexible circuit board by using the ACF conductive adhesive, so that the waterproof external electric connection of the other graphene heating sheet is realized, and the graphene heating sheet and the flexible circuit board connected with the graphene heating sheet can be bent.
The present invention in a preferred example may be further configured to: the impedance value of the positive electrode line and the impedance value of the adjacent negative electrode line are between 20 and 100 omega, specifically 50 +/-5 omega, and preferably, the hydrophobic silver paste coating comprises the following components in percentage by weight: 8-20% of spherical silver powder, and the particle size of the spherical silver powder is 2.5-6 microns; 40-60% of flake silver powder, wherein the particle size is 3-6 microns; 5-12% of nano silver powder, and the particle size of the nano silver powder is 18-60 nm; the organic carrier adopts 15-25% of vinyl resin, and the particle size of the vinyl resin is 0.9-1.5 microns; 5-15% of a DBE solvent; the oxide additive is 0.1-1%, the average particle size of the oxide additive is 0.4-1.0 micron, preferably, a plurality of avoiding holes are formed in the hydrophilic graphene heating coating between the positive electrode wire and the negative electrode wire, a plurality of air holes aligned with the avoiding holes are formed in the insulating carrier film, and the air holes have the size smaller than that of the avoiding holes and penetrate through the insulating coating film.
By adopting the preferable technical scheme, the heating sheet can be suitable for heating attached to a human body by utilizing the specific impedance value range of the positive electrode wire and the adjacent negative electrode wire, the positive electrode wire and the negative electrode wire formed by the hydrophobic silver paste coating have the characteristics of bending resistance and fracture resistance by utilizing the specific composition of a silver paste material used by the hydrophobic silver paste coating, and the graphene heating sheet has the ventilation function and the hydrophilic graphene heating coating is completely sealed by utilizing the avoiding hole, the ventilation hole, the positions of the ventilation hole and the ventilation hole, the penetrating form of the ventilation hole and the size relation of the ventilation hole, so that the waterproof effect is achieved.
The present invention in a preferred example may be further configured to: the thickness of the polyester film of the insulating carrier film is 0.025-0.1 mm, more preferably 0.038-0.05 mm, the thickness of the polyester film of the insulating laminating film is smaller than that of the polyester film of the insulating carrier film, preferably 0.025-0.038 mm, the silver paste coating thickness of the hydrophobic silver paste coating is 4-12 mu m, and the total film thickness of the graphene heating sheet is 0.08-0.4 mm.
By adopting the preferable technical scheme, the thickness range of the specific polyester film and the thickness range of the silver paste coating and the total film thickness range of the graphene heating sheet are utilized, so that the graphene heating sheet has a sufficiently thin structure and is more easily attached to the surface of a human body or clothes.
The main purpose of the invention is realized by the following technical scheme:
the preparation method of the flexible washable graphene heating sheet comprises the following steps:
providing an insulating carrier film, wherein the insulating carrier film is provided with a printing surface;
printing a hydrophobic silver paste coating on the printing surface of the insulating carrier film for the first time, wherein the hydrophobic silver paste coating comprises a positive electrode pattern and a negative electrode pattern which are not directly electrically connected with each other, the positive electrode pattern is integrally formed with a plurality of positive electrode wires and a first bus bar connected with the positive electrode wires, the negative electrode pattern is integrally formed with a plurality of negative electrode wires and a second bus bar connected with the negative electrode wires, and the positive electrode wires and the negative electrode wires are arranged in an equidistant staggered manner;
printing for the second time on the printing surface of the insulating carrier film to form a hydrophilic graphene heating coating, wherein the hydrophilic graphene heating coating is positioned between the first bus bar and the second bus bar and covers the thin film part between the positive electrode wire and the negative electrode wire;
printing for the third time on the printing surface of the insulating carrier film to form a waterproof coating, wherein the waterproof coating covers the hydrophilic graphene heating coating, the first bus bar and the second bus bar and is provided with a relatively flat binding surface, and
and adhering an insulating coating film to the adhering surface of the insulating carrier film, wherein the graphene heating sheet has folding resistance and water splashing resistance.
And by adopting the whole of the second basic technical scheme, the preparation of the washing-resistant and kneading-resistant graphene heating sheet is realized.
The present invention in a preferred example may be further configured to: the hydrophilic graphene heating coating also covers the positive electrode wire and the negative electrode wire, and preferably, the line gap between the adjacent positive electrode wire and the negative electrode wire is 0.4-1.2 cm; preferably, the thickness of the polyester film of the insulating carrier film is 0.025-0.1 mm, more preferably 0.038-0.05 mm, the thickness of the polyester film of the insulating laminating film is smaller than the thickness of the polyester film of the insulating carrier film, preferably 0.025-0.038 mm, the silver paste painting thickness of the hydrophobic silver paste coating is 4-12 mu m, and the total film thickness of the graphene heating sheet is 0.08-0.4 mm.
The main purpose of the invention is realized by the following technical scheme:
a silver paste material comprises the following components in parts by weight: 8-20% of spherical silver powder, specifically 13%, and the particle size of the spherical silver powder is 2.5-6 microns; 40-60% of flake silver powder, specifically 50%, and the particle size of the flake silver powder is 3-6 microns; 5-12% of nano silver powder, specifically 7%, and the particle size of the nano silver powder is 18-60 nm; the organic carrier adopts 15-25% of vinyl resin, specifically 20%, and the particle size is 0.9-1.5 microns; 5-15% of DBE solvent, specifically 9.7%, and the purity of the DBE solvent is 99%; 0.1-1%, specifically 0.3%, of the oxide additive Fe, wherein the average particle size of the oxide additive Fe is 0.4-1.0 micrometer, specifically 0.7 micrometer; preferably, when the hydrophobic silver paste coating layer of the graphene heating sheet is formed by printing with the silver paste material, the graphene heating sheet has folding endurance and water repellency.
Through adopting the whole of the third basic technical scheme, the application of the hydrophobic silver paste coating on the graphene heating sheet is realized by utilizing the silver paste material.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the washing-resistant and kneading-resistant graphene heating sheet is provided, and can be particularly applied to wearable equipment;
2. preparing a graphene heating sheet with a flexible and washable function;
3. in the preparation process of the graphene heating sheet, only thin film printing equipment and laminating equipment are needed, and assembling equipment of an external electrode plate is not needed;
4. overcomes the problem that the prior heating sheet can not resist washing and kneading, and specially develops a silver paste material with washing resistance, kneading resistance and high ductility.
Drawings
Fig. 1 is a schematic bottom view of a part of a flexible washable graphene heating sheet according to a first embodiment of the present invention;
fig. 2 is a schematic partial top view illustrating a graphene heating sheet according to a first embodiment of the invention;
fig. 3 is a schematic partial cross-sectional view illustrating a graphene heating sheet according to a first embodiment of the invention;
fig. 4A and 4B are top and cross sectional views respectively illustrating a combination of the graphene heating sheet on the side of the extraction electrode according to the first preferred embodiment of the present invention;
fig. 5A and 5B are schematic cross-sectional views illustrating another combination of the graphene heating sheet on the side of the lead electrode according to the first preferred embodiment of the invention during and after lamination;
fig. 6 is a flow chart illustrating a manufacturing process of a graphene heating sheet according to a second preferred embodiment of the invention;
fig. 7A to 7E are schematic partial cross-sectional views illustrating main steps in a manufacturing process of a graphene heat generating sheet according to a second preferred embodiment of the invention;
fig. 8 is a schematic bottom view of another flexible washable graphene heating sheet according to a fourth preferred embodiment of the invention;
fig. 9 is a schematic partial cross-sectional view illustrating a graphene heat generating sheet according to a fourth embodiment of the invention;
fig. 10 is a folding endurance test report of the graphene heating sheet according to the embodiment of the present invention;
fig. 11 is a test report of finished product water-repellent performance of the graphene heating sheet according to the embodiment of the present invention;
fig. 12 shows a washing machine water washing simulation test report of the graphene heating sheet according to the embodiment of the invention;
fig. 13 is a test report of adhesion of the graphene heating sheet according to the embodiment of the invention.
The printed circuit board comprises a printed circuit board body, a flexible printed circuit board body, a flexible printed circuit board body, a flexible printed circuit board body, a printed circuit board body.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of embodiments for understanding the inventive concept of the present invention, and do not represent all embodiments, nor do they explain only embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention under the understanding of the inventive concept of the present invention are within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In order to more conveniently understand the technical scheme of the present invention, the graphene heating sheet, the preparation method thereof, and the silver paste material of the present invention are further described and explained in detail below, but are not to be taken as the protection scope defined by the present invention.
FIG. 1 is a schematic partial bottom view of a flexible washable graphene heating sheet, and FIG. 2 is a schematic partial top view of the graphene heating sheet; fig. 3 is a schematic partial cross-sectional view of the graphene heating sheet; referring to fig. 1, 2 and 3, a first embodiment of the present invention provides a flexible washable graphene heating sheet, including an insulating support film 10, a hydrophobic silver paste coating 20, a hydrophilic graphene heating coating 30, a waterproof coating 40 and an insulating cover film 50. Fig. 4A and 4B are top and cross-sectional views respectively illustrating a combination of a graphene heating sheet on the side of the extraction electrode; fig. 5A and 5B are schematic cross-sectional views of another combination method of the graphene heating sheet on the side of the lead electrode during and after lamination, respectively.
The insulating carrier film 10 is provided with a printing surface 11, the insulating carrier film 10 can be a PET polyester film, the color can be transparent, white or black, and the insulating carrier film is a transparent insulating carrier film and is used for observing whether the position of the hydrophobic silver paste coating 20 is printed well.
The hydrophobic silver paste coating 20 is printed on the printing surface 11 of the insulating carrier film 10, the hydrophobic silver paste coating 20 includes a positive electrode pattern and a negative electrode pattern which are not directly electrically connected with each other, the positive electrode pattern is integrally formed with a plurality of positive electrode wires 21 and a first bus bar 23 connected with the positive electrode wires 21, the negative electrode pattern is integrally formed with a plurality of negative electrode wires 22 and a second bus bar 24 connected with the negative electrode wires 22, and the positive electrode wires 21 and the negative electrode wires 22 are arranged in an equidistant and staggered manner. The hydrophobic silver paste coating 20 is specifically a conductive circuit formed by silver paste printing, and is formed after printing and curing, so that the hydrophobic silver paste coating has excellent conductivity and soft anti-fracture toughness.
The hydrophilic graphene heating coating 30 is printed on the printing surface 11 of the insulating carrier film 10, and the hydrophilic graphene heating coating 30 is located between the first bus bar 23 and the second bus bar 24 and covers a thin film portion between the positive electrode line 21 and the negative electrode line 22.
The waterproof coating 40 is printed on the printing surface 11 of the insulating carrier film 10, the waterproof coating 40 covers the hydrophilic graphene heating coating 30, the first bus bar 23 and the second bus bar 24, and the waterproof coating 40 has a relatively flat attaching surface 41. One specific material of the waterproof coating 40 may be vinyl resin.
The insulating coating 50 is attached to the attaching surface 41 of the waterproof coating 40. One specific material of the insulating coating 50 may be PET polyester.
Specifically, the graphene heating sheet may have a folding endurance and a water-proof performance, referring to fig. 10 to 13, the folding endurance is shown in fig. 10, the folding endurance is tested to confirm the toughness of the hydrophobic silver paste coating 20 in the finished product, and the water-proof performance is shown in fig. 11, the water-proof performance is tested to confirm the electrical performance of the finished product when the finished product is in water, including confirming the electrical connection performance of the hydrophobic silver paste coating 20 when the finished product is in water-proof. More specifically, the graphene heating sheet can also have water washing resistance and ink falling resistance, the test condition of the water washing resistance is shown in fig. 12, the test condition of the water washing resistance is used for confirming whether a finished product can be put into a washing machine together with clothes for washing, and the heating function is not damaged, the test condition of the ink falling resistance is shown in fig. 13, and the test condition of the adhesion force is used for confirming whether each layer of ink formed by printing after the finished product is subjected to tearing action can fall off.
The implementation principle of the embodiment is as follows: utilize hydrophobic nature silver thick liquid coating 20 with hydrophilic graphite alkene generates heat the coating 30 printing and forms insulating year membrane 10's printing face 11 again with insulating tectorial membrane 50 laminate in waterproof coating 40, hydrophobic nature silver thick liquid coating 20 with hydrophilic graphite alkene generates heat between the coating 30 can not produce the cracked risk of structure and electrical property because both materials mix each other or permeate between the overlapping pattern of printing on the same face, and waterproof coating 40 provides for printing face 11 flatter binding face 41 on having two coatings, makes insulating tectorial membrane 50 more closely knit laminating, and the inside graphite alkene that has integrated positive and negative electrode and busbar generates heat the piece and has folding endurance and prevent splashing waterborne.
Regarding one possible coverage form of the hydrophilic graphene heating coating 30, in a preferred example, the hydrophilic graphene heating coating 30 further covers the positive electrode line 21 and the negative electrode line 22, preferably, a line gap between adjacent positive electrode lines 21 and negative electrode lines 22 is between 0.4 and 1.2 cm; preferably, the arrangement of the positive electrode lines 21 and the negative electrode lines 22 is linear and staggered, and gaps are respectively formed between the hydrophilic graphene heating coating 30 and the first bus bar 23 and between the hydrophilic graphene heating coating 30 and the second bus bar 24, that is, the hydrophilic graphene heating coating 30 does not directly touch the first bus bar 23 and the second bus bar 24. Therefore, the hydrophilic graphene heating coating 30 is used for covering the positive electrode wire 21 and the negative electrode wire 22, so that the contact area between the hydrophilic graphene heating coating 30 and the positive electrode wire 21/the negative electrode wire 22 can be increased, heating air connection is avoided, preferably, the heating of a low-voltage small-area module can be realized by using a line gap between the adjacent positive electrode wire 21 and the negative electrode wire 22 which is 0.4-1.2 cm, preferably, the block resistance value of the hydrophilic graphene heating coating 30 can be accurately defined by using the linearly staggered positive electrode wire 21 and the negative electrode wire 22, and the heating of a short-path resistance from a bus bar to an adjacent electrode can be avoided by using the gap between the hydrophilic graphene heating coating 30 and the bus bars on two sides.
Referring to fig. 4A and 4B, regarding an extraction electrode structure of the positive electrode pattern and the negative electrode pattern, in a preferred example, the positive electrode pattern further includes an extraction positive electrode 25 integrally connected to the first bus bar 23 and exposed to the insulating coating film 50, and the negative electrode pattern further includes an extraction negative electrode 26 integrally connected to the second bus bar 24 and exposed to the insulating coating film 50. Therefore, the extraction of the positive electrode and the negative electrode on one side of the membrane is realized by the extraction positive electrode 25 and the extraction negative electrode 26, and the heating area with the hydrophilic graphene heating coating 30 can be completely sealed.
Regarding a lead-out connection manner of the positive electrode pattern and the negative electrode pattern, in a preferred example, the lead-out positive electrode 25 and the lead-out negative electrode 26 have a riveting hole structure, and preferably, each of the lead-out positive electrode 25 and the lead-out negative electrode 26 has two or more riveting holes 27. The staking holes 27 may be prepared in advance by specialized equipment and specialized dies. Therefore, the lead-out positive electrode 25 and the lead-out negative electrode 26 of the riveting hole structure are used for realizing waterproof external electric connection of the graphene heating sheet, preferably, two or more riveting holes 27 are formed in each lead-out electrode, the stability of external electric connection can be improved, the riveting performance is good, the problem that one riveting hole 27 is poor to cause connection is prevented, abnormal heating and even burning loss of a riveting position in the heating process caused by virtual connection are prevented, the problems can be effectively avoided through the compound riveting hole design, and when one riveting terminal is in a problem, the other riveting terminal can still meet the requirement. Then, a transfer welding method can be adopted, and welding operation is performed through a conductive structure which is connected with the riveting hole 27 and led out of the polyester film.
Referring to fig. 5A and 5B, regarding another lead-out connection manner of the positive electrode pattern and the negative electrode pattern, in a preferred example, the lead-out positive electrode 25 and the lead-out negative electrode 26 are connected to a Flexible Printed Circuit (FPC)70 by an ACF conductive adhesive (anisotropic conductive adhesive) 60. The ACF conductive adhesive 60 is used as a bonding agent, technical bonding is carried out in a pulse hot pressing mode, the flexible circuit board 70 is used as an external connection material for switching, and a high-temperature-resistant welding lead capable of being subjected to welding processing is formed under high-strength bonding. Therefore, the ACF conductive adhesive 60 is used to connect the lead-out positive electrode 25 and the lead-out negative electrode 26 to the flexible circuit board 70, so that the waterproof external electrical connection of the other graphene heating sheet is realized, and the graphene heating sheet and the flexible circuit board connected thereto can be bent. In addition, the ACF conductive paste 60 includes a paste synthetic resin and conductive particles having an equal spherical diameter, and the particle diameter of the conductive particles is about 20 + -2 μm. The ACF conductive paste 60 may be 3M7303 conductive paste.
Regarding one specific implementation of the impedance value of the finished product, in a preferred example, the impedance value of the positive electrode line 21 and the impedance value of the adjacent negative electrode line 22 are between 20 Ω and 100 Ω, and may be 50 ± 5 Ω. Therefore, the specific impedance value range of the positive electrode line 21 and the adjacent negative electrode line 22 can be used for heating with the human body attached. The adjustment of the impedance value is mainly changed based on the gap between the positive electrode line 21 and the adjacent negative electrode line 22 and the characteristics of the hydrophilic graphene heat-generating coating 30.
With respect to one practical material of the hydrophobic silver paste coating layer 20, in a preferred example, the composition of the silver paste material used in the hydrophobic silver paste coating layer 20 includes: 8-20% of spherical silver powder, and the particle size of the spherical silver powder is 2.5-6 microns; 40-60% of flake silver powder, wherein the particle size is 3-6 microns; 5-12% of nano silver powder, and the particle size of the nano silver powder is 18-60 nm; the organic carrier adopts 15-25% of vinyl resin, and the particle size of the vinyl resin is 0.9-1.5 microns; 5-15% of a DBE solvent; 0.1 to 1% of an oxide additive, and an average particle diameter of 0.4 to 1.0 μm. Therefore, with the specific composition of the silver paste material used for the hydrophobic silver paste coating 20, the positive electrode wire 21 and the negative electrode wire 22 formed by the hydrophobic silver paste coating 20 have the characteristics of bending resistance and fracture resistance.
Regarding a specific range of the film thickness of each layer, in a preferred example, the polyester film thickness of the insulating carrier film 10 is 0.025-0.1 mm, and more preferably 0.038-0.05 mm, the polyester film thickness of the insulating cover film 50 is less than the polyester film thickness of the insulating carrier film 10, preferably 0.025-0.038 mm, the silver paste coating thickness of the hydrophobic silver paste coating 20 is 4-12 μm, and the total film thickness of the graphene heating sheet is 0.08-0.4 mm. One of the functions of the waterproof coating 40 is to repair the surface to which the insulating coating 50 is pressed to be more flat, and the painting thickness is 5-20 μm, and the other is to improve the side waterproof performance of the graphene heating sheet. Therefore, the thickness range of the specific polyester film, the thickness range of silver paste coating and the total film thickness range of the graphene heating sheet are utilized, so that the graphene heating sheet has a sufficiently thin structure, is easier to attach to the surface of a human body or clothes, and can achieve better flexibility and stable anti-pulling mechanical strength.
In addition, a second embodiment of the present invention further provides a method for manufacturing a flexible washable graphene heating sheet, which is used to manufacture the graphene heating sheet of the first embodiment or a graphene heating sheet with similar functions, and fig. 6 is a flowchart illustrating the manufacturing process; fig. 7A to 7E are schematic cross-sectional views of a part of the device in the main steps of the manufacturing process, which is transverse to the extending direction of the positive and negative electrode lines 22; the preparation method includes the following main steps S1 to S5.
Referring to fig. 7A, the insulating carrier film 10 has a printing surface 11, the insulating carrier film 10 can be divided into a heating area, a bus area and a peripheral area, the heating area is located between the bus areas, and the peripheral area is located at the periphery of the bus area;
step S2 is about the first printing of the hydrophobic silver paste coating 20 on the insulating carrier film 10; with reference to figure 7B of the drawings, a hydrophobic silver paste coating 20 is printed on the printing surface 11 of the insulating carrier film 10 for the first time, the hydrophobic silver paste coating 20 includes a positive electrode pattern and a negative electrode pattern that are not directly electrically connected to each other, the positive electrode pattern is integrally formed with a plurality of positive electrode lines 21 and first bus bars 23 connecting the positive electrode lines 21, the negative electrode pattern is integrally formed with a plurality of negative electrode lines 22 and a second bus bar 24 connecting the negative electrode lines 22, the positive electrode wires 21 and the negative electrode wires 22 are arranged in an equidistant and staggered manner; the patterns of the positive electrode lines 21 and the negative electrode lines 22 of the hydrophobic silver paste coating 20 are specifically located in the heating area of the insulating carrier film 10; the first bus bar 23 and the second bus bar 24 of the hydrophobic silver paste coating 20 are specifically located in a bus region of the insulating carrier film 10;
step S3 is to form a hydrophilic graphene heating coating 30 on the insulating support film 10 by second printing, and referring to fig. 7C, form a hydrophilic graphene heating coating 30 on the printing surface 11 of the insulating support film 10 by second printing, where the hydrophilic graphene heating coating 30 is located between the first bus bar 23 and the second bus bar 24 and covers a thin film portion between the positive electrode line 21 and the negative electrode line 22, and a pattern of the hydrophilic graphene heating coating 30 is specifically located in a heating area of the insulating support film 10;
step S4 is related to forming a waterproof coating 40 on the insulating support film 10 by third printing, referring to fig. 7D, forming a waterproof coating 40 on the printing surface 11 of the insulating support film 10 by third printing, wherein the waterproof coating 40 covers the hydrophilic graphene heating coating 30, the first bus bar 23 and the second bus bar 24, and the waterproof coating 40 has a relatively flat bonding surface 41, specifically, the thickness of the waterproof coating 40 in the peripheral region of the insulating support film 10 is greater than the thickness in the junction region and the heating region of the insulating support film 10, so as to prevent moisture from entering from the edge of the graphene heating sheet;
step S5 is about pasting an insulating film 50 on the waterproof coating 40, referring to FIG. 7E, pasting the insulating film 50 on the pasting surface 41 of the insulating carrier film 10, specifically, the prepared graphene heating sheet has folding endurance and waterproof performance through tests;
specifically, the above main steps S1 to S5 are performed on a film mother sheet, a plurality of unit regions corresponding to the shape of the product film are integrated together, and the desired individual shape is cut after the printing and bonding processes are completed.
The implementation principle of the embodiment is as follows: the hydrophobic silver paste coating 20, the hydrophilic graphene heating coating 30 and the waterproof coating 40 are respectively formed by single-sided multiple printing, and are attached to the insulating covering film 50, so that the hydrophobic silver paste coating 20 and the hydrophilic graphene heating coating 30 can be tightly clamped and sealed between the insulating carrying film 10 and the insulating covering film 50 without gaps, and the prepared heating sheet has folding resistance and water splashing resistance with respect to the hydrophobic silver paste coating 20, and therefore the graphene heating sheet with washing resistance and rubbing resistance effects can be prepared.
Regarding a practical method for forming patterned printing of the hydrophobic silver paste coating 20 in step S2, in a preferred example, the pattern can be formed by using a polyester net pulled at an angle of 22.5 degrees by a 300-mesh cable, the thickness of the coating photosensitive resist is 85 μm, and a special polyester coated screen plate is prepared by a special equipment mist spray automatic developing machine; the method comprises the steps of printing silver paste according to screen patterns of technical requirements by a full-automatic roll material printing machine printing technology without lifting a table top to form and prepare a hydrophobic silver paste coating 20 which is resistant to washing and rubbing and high in ductility, and then carrying out double-acting curing and aging by novel tunnel type short wave radiation and hot air circulation.
Regarding the possible thickness dimension range of the main member, in a preferred example, the hydrophilic graphene heating coating 30 also covers the positive electrode line 21 and the negative electrode line 22, preferably, the line gap between the adjacent positive electrode line 21 and the negative electrode line 22 is between 0.4 and 1.2 cm; preferably, the thickness of the polyester film of the insulating carrier film 10 is 0.025-0.1 mm, more preferably 0.038-0.05 mm, the thickness of the polyester film of the insulating cover film 50 is smaller than the thickness of the polyester film of the insulating carrier film 10, preferably 0.025-0.038 mm, the thickness of the silver paste coating of the hydrophobic silver paste coating 20 is 4-12 μm, and the total film thickness of the graphene heating sheet is 0.08-0.4 mm.
The third embodiment of the invention provides a silver paste material, which comprises the following components in percentage by weight: 8-20% of spherical silver powder, specifically 13%, and the particle size of the spherical silver powder is 2.5-6 microns; 40-60% of flake silver powder, specifically 50%, and the particle size of the flake silver powder is 3-6 microns; 5-12% of nano silver powder, specifically 7%, and the particle size of the nano silver powder is 18-60 nm; the organic carrier adopts 15-25% of vinyl resin, specifically 20%, and the particle size is 0.9-1.5 microns; 5-15% of DBE solvent, specifically 9.7%, and the purity of the DBE solvent is 99%; 0.1-1%, specifically 0.3%, of Fe (iron powder) as an oxide additive, wherein the average particle size of the Fe (iron powder) is 0.4-1.0 micrometer, specifically 0.7 micrometer; preferably, when the hydrophobic silver paste coating 20 of the graphene exothermic sheet is formed by printing with the silver paste material, the graphene exothermic sheet has folding endurance and water repellency.
Under the proportion range, the spherical silver powder can provide excellent conductivity and resistance stability, the flake silver powder can provide excellent ductility, the nano silver powder can effectively fill a combination gap between the spherical silver powder and the flake silver powder, the compactness and the rubbing resistance of the silver powder are improved, stable resistance expression and thermal conversion after electrification can be achieved, and the ductility of the silver paste is effectively considered due to the selection and proportion of the vinyl resin and the oxide additive.
A fourth embodiment of the invention further provides a flexible washable graphene heating sheet, and fig. 8 is a schematic bottom view of a part of the graphene heating sheet; fig. 9 is a partially cut-away schematic view of the graphene heating sheet. Referring to fig. 8 and 9, the graphene heating sheet includes an insulating carrier film 10, a hydrophobic silver paste coating 20, a hydrophilic graphene heating coating 30, a waterproof coating 40, and an insulating cover film 50.
The insulating carrier film 10 has a printed surface 11. The hydrophobic silver paste coating 20 is printed on the printing surface 11 of the insulating carrier film 10, the hydrophobic silver paste coating 20 includes a positive electrode pattern and a negative electrode pattern which are not directly electrically connected with each other, the positive electrode pattern is integrally formed with a plurality of positive electrode wires 21 and a first bus bar 23 connected with the positive electrode wires 21, the negative electrode pattern is integrally formed with a plurality of negative electrode wires 22 and a second bus bar 24 connected with the negative electrode wires 22, and the positive electrode wires 21 and the negative electrode wires 22 are arranged in an equidistant and staggered manner. The hydrophobic silver paste coating 20 is specifically a conductive circuit formed by silver paste printing, and is formed after printing and curing, so that the hydrophobic silver paste coating has excellent conductivity and soft anti-fracture toughness.
The hydrophilic graphene heating coating 30 is printed on the printing surface 11 of the insulating carrier film 10, and the hydrophilic graphene heating coating 30 is located between the first bus bar 23 and the second bus bar 24 and covers a thin film portion between the positive electrode line 21 and the negative electrode line 22.
The waterproof coating 40 is printed on the printing surface 11 of the insulating carrier film 10, the waterproof coating 40 covers the hydrophilic graphene heating coating 30, the first bus bar 23 and the second bus bar 24, and the waterproof coating 40 has a relatively flat attaching surface 41. The insulating coating 50 is attached to the attaching surface 41 of the waterproof coating 40.
In order to increase the gas permeability of product, hydrophilic graphene heating coating 30 is in positive electrode line 21 with a plurality of dodge holes 31 can be opened preferably between the negative electrode line 22, insulating year membrane 10 has seted up a plurality of alignments dodge hole 12 of hole 31, bleeder vent 12 has and is less than dodge the size of hole 31 and run through to insulating tectorial membrane 50. Therefore, the graphene heating sheet has a ventilation function by using the avoiding hole 31, the air holes 12, the positions of the air holes 12, the penetrating form of the air holes 12 and the size relationship, and the hydrophilic graphene heating coating 30 is completely sealed to achieve a waterproof effect.
Fig. 10 is a folding endurance test report of the graphene heating sheet according to the embodiment of the present invention; the use tool has: a, 2, CKg weight and 1mm small rod which can bend the sample by 180 degrees, b, measuring the impedance of the sample according to the marked position of the sample by adding impedance test to an ammeter and recording a plurality of samples, and c, checking whether the circuit has a fracture phenomenon by using a tenfold instrument. 1, taking the mcmbrane out of the Pin, bending the mcmbrane by 180 degrees, putting a small rod with the diameter of 1mm into the bend, pressing the Pin end by using a 2kg weight for 1 minute (the back and forth is 1 time), firstly measuring the original resistance, then measuring the resistance every 100 times, and after 500 times, the resistance is not more than 1.5 times of the original resistance; 2. whether the bend is empty or broken is observed by 10 times of magnification. Through the experiment, the graphene heating sheet provided by the embodiment can pass the folding endurance test, the resistance after the experiment does not exceed the original resistance by 1.5 times, and the bending part is free from penetration and fracture.
Fig. 11 is a test report of finished product water-repellent performance of the graphene heating sheet according to the embodiment of the present invention; the experimental conditions included: 1. test solutions: normal temperature water, 2. solution dosage: 100C.C, 3. Water splash test time (minutes): 10 → 10 → 10 → 30 → 10 → 10 → 10 points, 4. Total test time: for 24 hours. The experimental method comprises 1, testing the heating sheet and placing in a plastic box, measuring 100ml with paper cup, and measuring temperature: 2, after 3 minutes, taking up the heating sheet, inclining to allow the water to flow out of the plastic box, taking out the heating sheet from the plastic box, flatly placing for 2 hours, electrifying every hour to detect whether the electrical function is normal, and testing whether the function is normal, namely, the product is qualified. Through experiments, the graphene heating sheet provided by the embodiment is free of break/short circuit under the break/short circuit test condition.
Fig. 12 shows a washing machine water washing simulation test report of the graphene heating sheet according to the embodiment of the invention; the experimental conditions included: 1. the test method comprises the following steps: washing machine continuous washing test 100H, 2. washing machine specification: drum washer/pulsator washer 3. addition material: washing powder/laundry detergent. The experimental method comprises the steps of 1, placing the sample in a washing machine for testing, turning on a switch of the washing machine to a powerful mode, setting the time to be 100 hours, 2, simulating a normal washing process in the washing machine, adding washing powder/washing liquid, and 3, continuously testing until the time reaches 100H without stopping the washing machine in the testing process. Through tests, the graphene heating sheet 1. the break/short circuit test condition is no break/short circuit before and after the experiment, and the contact impedance change condition is 50 omega and 3 before and after the experiment, and the surface of the graphene ink does not fall off before and after the experiment.
Fig. 13 is a test report of adhesion of the graphene heating sheet according to the embodiment of the invention; using a tool: 2, judging the method: the baked graphene heating sheet is horizontally placed on a lamp table, a rubber belt is attached to a printing surface by about 10cm, the 3M600 rubber belt is torn up at a 45 ℃ angle after 1 minute, and whether the ink falling phenomenon exists is observed. Through tests, the graphene heating sheet provided by the embodiment has no ink falling off.
The embodiments of the present invention are merely preferred embodiments for easy understanding or implementing of the technical solutions of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes in structure, shape and principle of the present invention should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a flexible graphite alkene piece that generates heat that can wash which characterized in that includes:
an insulating carrier film (10) having a printing surface (11);
the hydrophobic silver paste coating (20) is printed and formed on the printing surface (11) of the insulating carrier film (10), the hydrophobic silver paste coating (20) comprises a positive electrode pattern and a negative electrode pattern which are not directly electrically connected with each other, a plurality of positive electrode wires (21) and first bus bars (23) connected with the positive electrode wires (21) are integrally formed on the positive electrode pattern, a plurality of negative electrode wires (22) and second bus bars (24) connected with the negative electrode wires (22) are integrally formed on the negative electrode pattern, and the positive electrode wires (21) and the negative electrode wires (22) are arranged in an equidistant and staggered mode;
the hydrophilic graphene heating coating (30) is printed and formed on the printing surface (11) of the insulating carrier film (10), and the hydrophilic graphene heating coating (30) is located between the first bus bar (23) and the second bus bar (24) and covers a thin film part between the positive electrode line (21) and the negative electrode line (22);
a waterproof coating (40) printed on the printing surface (11) of the insulating carrier film (10), wherein the waterproof coating (40) covers the hydrophilic graphene heating coating (30), the first bus bar (23) and the second bus bar (24), and the waterproof coating (40) has a relatively flat bonding surface (41), and
an insulating coating film (50) attached to the attachment surface (41) of the waterproof coating layer (40);
the graphene heating sheet has folding resistance and water splashing prevention performance.
2. The graphene heating sheet according to claim 1, wherein the hydrophilic graphene heating coating (30) further covers the positive electrode wire (21) and the negative electrode wire (22), preferably, the line gap between the adjacent positive electrode wire (21) and the negative electrode wire (22) is 0.4-1.2 cm; preferably, the positive electrode lines (21) and the negative electrode lines (22) are arranged in a straight line and staggered manner, and gaps are respectively formed between the hydrophilic graphene heating coating (30) and the first bus bar (23) and between the hydrophilic graphene heating coating and the second bus bar (24).
3. The graphene heat generating sheet according to claim 1, wherein the positive electrode pattern further includes a lead-out positive electrode (25) integrally connected to the first bus bar (23) and exposed to the insulating cover (50), and the negative electrode pattern further includes a lead-out negative electrode (26) integrally connected to the second bus bar (24) and exposed to the insulating cover (50).
4. The graphene heating sheet according to claim 3, wherein the extraction positive electrode (25) and the extraction negative electrode (26) have a riveting hole structure, and preferably, the extraction positive electrode (25) and the extraction negative electrode (26) of each have two or more riveting holes (27).
5. The graphene heat generating sheet according to claim 3, wherein the extraction positive electrode (25) and the extraction negative electrode (26) are connected to a flexible circuit board (70) by ACF conductive adhesive (60).
6. The graphene heating sheet according to any one of claims 1 to 5, wherein the impedance value of the positive electrode line (21) and the adjacent negative electrode line (22) is between 20 Ω and 100 Ω, and may be 50 ± 5 Ω, and preferably, the composition of the silver paste material used in the hydrophobic silver paste coating layer (20) comprises, by weight: 8-20% of spherical silver powder, and the particle size of the spherical silver powder is 2.5-6 microns; 40-60% of flake silver powder, wherein the particle size is 3-6 microns; 5-12% of nano silver powder, and the particle size of the nano silver powder is 18-60 nm; the organic carrier adopts 15-25% of vinyl resin, and the particle size of the vinyl resin is 0.9-1.5 microns; 5-15% of a DBE solvent; the oxide additive is 0.1-1%, the average particle size of the oxide additive is 0.4-1.0 micron, preferably, a plurality of avoiding holes (31) are formed in the hydrophilic graphene heating coating (30) between the positive electrode wire (21) and the negative electrode wire (22), a plurality of air holes (12) aligned with the avoiding holes (31) are formed in the insulating carrier film (10), and the air holes (12) have the size smaller than that of the avoiding holes (31) and penetrate through the insulating coating film (50).
7. The graphene heating sheet according to claim 6, wherein the polyester film thickness of the insulating carrier film (10) is 0.025-0.1 mm, more preferably 0.038-0.05 mm, the polyester film thickness of the insulating coating film (50) is less than the polyester film thickness of the insulating carrier film (10), preferably 0.025-0.038 mm, the brushing thickness of the hydrophobic silver paste coating (20) is 4-12 μm, and the total film thickness of the graphene heating sheet is 0.08-0.4 mm.
8. A preparation method of a flexible washable graphene heating sheet is characterized by comprising the following steps:
providing an insulating carrier film (10), wherein the insulating carrier film (10) is provided with a printing surface (11);
printing a hydrophobic silver paste coating (20) on the printing surface (11) of the insulating carrier film (10) for the first time, wherein the hydrophobic silver paste coating (20) comprises a positive electrode pattern and a negative electrode pattern which are not directly electrically connected with each other, a plurality of positive electrode wires (21) and first bus bars (23) connected with the positive electrode wires (21) are integrally formed on the positive electrode pattern, a plurality of negative electrode wires (22) and second bus bars (24) connected with the negative electrode wires (22) are integrally formed on the negative electrode pattern, and the positive electrode wires (21) and the negative electrode wires (22) are arranged in an equidistant and staggered mode;
printing for the second time on the printing surface (11) of the insulating carrier film (10) to form a hydrophilic graphene heating coating (30), wherein the hydrophilic graphene heating coating (30) is located between the first bus bar (23) and the second bus bar (24) and covers a thin film part between the positive electrode line (21) and the negative electrode line (22);
printing for the third time on the printing surface (11) of the insulating carrier film (10) to form a waterproof coating (40), wherein the waterproof coating (40) covers the hydrophilic graphene heating coating (30), the first bus bar (23) and the second bus bar (24), and the waterproof coating (40) has a relatively flat bonding surface (41), and
and adhering an insulating coating film (50) to the adhering surface (41) of the insulating carrier film (10), wherein the graphene heating sheet has folding resistance and water repellency.
9. The preparation method of the graphene heating sheet according to claim 8, wherein the hydrophilic graphene heating coating (30) further covers the positive electrode wire (21) and the negative electrode wire (22), preferably, the line gap between the adjacent positive electrode wire (21) and the negative electrode wire (22) is 0.4-1.2 cm; preferably, the thickness of the polyester film of the insulating carrier film (10) is 0.025-0.1 mm, more preferably 0.038-0.05 mm, the thickness of the polyester film of the insulating coating film (50) is smaller than the thickness of the polyester film of the insulating carrier film (10), preferably 0.025-0.038 mm, the thickness of the silver paste coating of the hydrophobic silver paste coating (20) is 4-12 mu m, and the total thickness of the graphene heating sheet is 0.08-0.4 mm.
10. The silver paste material is characterized by comprising the following components in percentage by weight: 8-20% of spherical silver powder, and the particle size of the spherical silver powder is 2.5-6 microns; 40-60% of flake silver powder, wherein the particle size is 3-6 microns; 5-12% of nano silver powder, and the particle size of the nano silver powder is 18-60 nm; the organic carrier adopts 15-25% of vinyl resin, and the particle size of the vinyl resin is 0.9-1.5 microns; 5-15% of a DBE solvent; 0.1-1% of oxide additive, and the average grain diameter of the oxide additive is 0.4-1.0 micron; preferably, when the hydrophobic silver paste coating layer of the graphene heating sheet is formed by printing with the silver paste material, the graphene heating sheet has folding endurance and water repellency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911366881.8A CN110933789A (en) | 2019-12-26 | 2019-12-26 | Flexible washable graphene heating sheet, preparation method thereof and silver paste material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911366881.8A CN110933789A (en) | 2019-12-26 | 2019-12-26 | Flexible washable graphene heating sheet, preparation method thereof and silver paste material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110933789A true CN110933789A (en) | 2020-03-27 |
Family
ID=69861006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911366881.8A Pending CN110933789A (en) | 2019-12-26 | 2019-12-26 | Flexible washable graphene heating sheet, preparation method thereof and silver paste material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110933789A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111556598A (en) * | 2020-05-27 | 2020-08-18 | 佛山(华南)新材料研究院 | Flexible low-voltage infrared electrothermal film and preparation method thereof |
| CN112757724A (en) * | 2020-12-29 | 2021-05-07 | 宁波世一科技有限责任公司 | Flexible metal-based graphene electrothermal material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882409A (en) * | 2018-06-20 | 2018-11-23 | 无锡格菲电子薄膜科技有限公司 | A kind of flexible waterproof washes Electric radiant Heating Film and preparation method thereof |
| CN208424816U (en) * | 2018-08-01 | 2019-01-22 | 无锡智诺天电子科技有限公司 | A kind of washable Flexible graphene low-voltage electrothermal film |
| CN109309972A (en) * | 2017-07-28 | 2019-02-05 | 杭州好德利智能科技有限公司 | A kind of flexible water Electric radiant Heating Film and preparation method thereof |
| CN211019283U (en) * | 2019-12-26 | 2020-07-14 | 深圳市璞瑞达薄膜开关技术有限公司 | Flexible washable graphene heating sheet |
-
2019
- 2019-12-26 CN CN201911366881.8A patent/CN110933789A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309972A (en) * | 2017-07-28 | 2019-02-05 | 杭州好德利智能科技有限公司 | A kind of flexible water Electric radiant Heating Film and preparation method thereof |
| CN108882409A (en) * | 2018-06-20 | 2018-11-23 | 无锡格菲电子薄膜科技有限公司 | A kind of flexible waterproof washes Electric radiant Heating Film and preparation method thereof |
| CN208424816U (en) * | 2018-08-01 | 2019-01-22 | 无锡智诺天电子科技有限公司 | A kind of washable Flexible graphene low-voltage electrothermal film |
| CN211019283U (en) * | 2019-12-26 | 2020-07-14 | 深圳市璞瑞达薄膜开关技术有限公司 | Flexible washable graphene heating sheet |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111556598A (en) * | 2020-05-27 | 2020-08-18 | 佛山(华南)新材料研究院 | Flexible low-voltage infrared electrothermal film and preparation method thereof |
| CN111556598B (en) * | 2020-05-27 | 2022-05-27 | 佛山(华南)新材料研究院 | Flexible low-voltage infrared electrothermal film and preparation method thereof |
| CN112757724A (en) * | 2020-12-29 | 2021-05-07 | 宁波世一科技有限责任公司 | Flexible metal-based graphene electrothermal material and preparation method thereof |
| CN112757724B (en) * | 2020-12-29 | 2022-05-20 | 杭州宜联研仿科技有限公司 | Preparation method of flexible metal-based graphene electrothermal material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI736572B (en) | Stretchable conductor composition, paste for forming stretchable conductor, clothes with wiring composed of stretchable conductor composition, and manufacturing method thereof | |
| CN108701505B (en) | Stretchable conductor sheet, stretchable conductor sheet having adhesive property, and method for forming wiring composed of stretchable conductor on fabric | |
| US11357104B2 (en) | Garment-type electronic device and method for producing same | |
| CN211019283U (en) | Flexible washable graphene heating sheet | |
| JP3813418B2 (en) | Flexible multilayer wiring board | |
| CN110933789A (en) | Flexible washable graphene heating sheet, preparation method thereof and silver paste material | |
| CN111065176A (en) | Waterproof graphene heating sheet and preparation method thereof | |
| JP2007173226A (en) | Rubber material and manufacturing method of the same | |
| WO2018034488A1 (en) | Flexible planar heating element and method for manufacturing same | |
| TWI715743B (en) | Wearable smart device with flexible electrical wiring and manufacturing method of flexible electrical wiring | |
| CN208424816U (en) | A kind of washable Flexible graphene low-voltage electrothermal film | |
| CN210469766U (en) | Electric heating device | |
| CN106158480B (en) | A kind of thin film switch and preparation method thereof | |
| CN110105813A (en) | A kind of carbon-based conductive ink preparation method and the usage | |
| JP2018092940A (en) | Method of forming electrically conductive composite | |
| CN107405097A (en) | Organism electrode assembly | |
| CN103959028B (en) | load sensor | |
| CN109496064A (en) | A kind of flexible circuit board | |
| CN112361891A (en) | Method for manufacturing conductive target plate | |
| CN104602448B (en) | Flexible circuit board and preparation method thereof | |
| CN110798918A (en) | Washable flexible graphene low-voltage electrothermal film and preparation method thereof | |
| CN211047260U (en) | Soaking scald preventing graphite alkene piece that generates heat | |
| CN107734831A (en) | Wearable flexible conductive fabric and preparation method thereof | |
| CN110996409B (en) | Soaking scald-preventing graphene heating sheet and preparation method thereof | |
| CN211209950U (en) | Waterproof graphene heating sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |