CN213586336U - Far infrared electrothermal film and electric heater - Google Patents
Far infrared electrothermal film and electric heater Download PDFInfo
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- CN213586336U CN213586336U CN202022570020.6U CN202022570020U CN213586336U CN 213586336 U CN213586336 U CN 213586336U CN 202022570020 U CN202022570020 U CN 202022570020U CN 213586336 U CN213586336 U CN 213586336U
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Abstract
The utility model provides a far infrared electrothermal film and electric heater, wherein, this far infrared electrothermal film includes the basement, and the insulating layer, graphite alkene heating layer, insulating layer, waterproof layer and the protective layer that set gradually on the upper surface of basement, on the one hand through changing the structure of far infrared electrothermal film, increases the insulating layer on the basement, prevents that the heat that graphite alkene heating layer produced from diffusing to the stratum basale, and increases the waterproof layer on the insulating layer, and the waterproof layer wraps up the side of far infrared electrothermal film, thereby improves the waterproof performance of far infrared electrothermal film; on the other hand, by changing the formula of the graphene heating layer and adding the conductive material polypyrrole, the heating efficiency of the graphene heating layer is higher.
Description
Technical Field
The utility model relates to an electric heat membrane technical field, in particular to far infrared electric heat membrane and electric heater.
Background
The electric heating film is a semitransparent polyester film which can generate heat after being electrified, and when the electric heating film works, the electric heating film is used as a heating body, heat is sent into a space in a radiation mode, so that a human body and an object are firstly warmed, and the comprehensive effect of the electric heating film is superior to that of a traditional heating mode. Compared with the traditional conductive heating materials (such as metal conductor materials), the electric heating film developed in recent years has attracted more and more attention because of its advantages of high electric-heat conversion efficiency, long service life, and emitting far infrared rays.
The thin film heating sheet which utilizes the graphene film layer to generate heat mechanically forms a heating bag which generates heat or/and chemically reacts with a warm bag, so that the thin film heating sheet is more suitable for human bodies and has the characteristic of environmental protection, the thin film heating sheet can be repeatedly used, the thin film heating sheet is easy to attach and use, the small film heating sheet can be conveniently carried or can be clamped in clothes. The existing electrothermal film technology and products in the market can not uniformly generate heat, can scald human bodies easily in use, have the danger of electric leakage, can not prevent water, and have the quality problems of low heating efficiency and the like.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing a far infrared electrothermal film, which aims at improving the performance of the far infrared electrothermal film.
In order to achieve the above object, the utility model provides a far infrared electrothermal film, include:
a substrate having an upper surface and a lower surface;
the heat insulation layer is arranged on the upper surface of the substrate;
the graphene heating layer is arranged on the heat insulation layer;
the insulating layer is arranged on the graphene heating layer;
the waterproof layer is arranged on the insulating layer and wraps the side face of the far infrared electrothermal film;
and the protective layer is arranged on the waterproof layer.
Optionally, the thermal insulation layer is any one of glass fiber, asbestos, rock wool, silicate, polystyrene board, aerogel felt or vacuum board.
Optionally, the graphene heating layer includes, by mass fraction: 15-40% of graphene, 10-30% of polypyrrole, 5-15% of a dispersing agent, 10-20% of a curing agent and 5-10% of a flatting agent.
Optionally, the dispersant is a low molecular wax or 3-aminopropyltriethoxysilane.
Optionally, the leveling agent is one or a mixture of two of an organic silicon leveling agent and an acrylic leveling agent.
Optionally, the curing agent is one or more of fluoboric acid and cadmium chloride.
Optionally, the thickness of the graphene heating layer is 20-40 um.
Optionally, the thickness of the waterproof layer is 10-30 um.
Optionally, the substrate is an insulating ceramic or an insulating metal.
The utility model also provides an electric heater, the last preparation of electric heater has above-mentioned arbitrary one far infrared electric heat membrane.
The technical scheme of the utility model is that on one hand, the insulating layer is added on the base by changing the structure of the far infrared electrothermal film, the heat generated by the graphene heating layer is prevented from diffusing to the basal layer, and the waterproof layer is added on the insulating layer and wraps the side surface of the far infrared electrothermal film, thereby improving the waterproof performance of the far infrared electrothermal film; on the other hand, by changing the formula of the graphene heating layer and adding the conductive material polypyrrole, the heating efficiency of the graphene heating layer is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of the far infrared electrothermal film of the present invention;
fig. 2 is a schematic flow chart of the preparation method of the far infrared electrothermal film of the present invention.
The reference numbers illustrate:
1: a substrate; 3: a thermal insulation layer; 5: a graphene heating layer; 7: an insulating layer; 9: a waterproof layer; 11: and a protective layer.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The utility model provides a far infrared electrothermal film, this far infrared electrothermal film's waterproof performance is good, and heat conductivility is good.
Referring to fig. 1, fig. 1 is the structure diagram of the far infrared electrothermal film of the present invention, in the embodiment of the present invention, this far infrared electrothermal film includes: a substrate 1, said substrate 1 having an upper surface and a lower surface; the heat insulation layer 3 is arranged on the upper surface of the substrate 1; graphene generates heat layer 5, graphene generates heat layer 5 set up in on the insulating layer 3, graphene generates heat layer 5 includes according to the mass fraction ratio: 15-40% of graphene, 10-30% of polypyrrole, 5-15% of a dispersing agent, 10-20% of a curing agent and 5-10% of a flatting agent; the insulating layer 7 is arranged on the graphene heating layer 5; the waterproof layer 9 is arranged on the insulating layer 7, and wraps the side face of the far infrared electrothermal film; and the protective layer 11 is arranged on the waterproof layer 9.
The technical scheme of the utility model is that on one hand, the heat insulation layer 3 is added on the substrate 1 by changing the structure of the far infrared electrothermal film, the heat generated by the graphene heat insulation layer 5 is prevented from diffusing to the substrate 1, and the waterproof layer 9 is added on the insulating layer 7, and the waterproof layer 9 wraps the side surface of the far infrared electrothermal film, thereby improving the waterproof performance of the far infrared electrothermal film; on the other hand, by changing the formula of the graphene heating layer 5 and adding the conductive material polypyrrole, the heating efficiency of the graphene heating layer 5 is higher.
Specifically, the substrate 1 serves as a carrier to support the far infrared electrothermal film, and the substrate 1 is generally selected in consideration of insulation, thermal conductivity and elastic modulus. The substrate 1 should have good insulation to ensure that a good carrier path is formed in the graphene heat-generating layer 5; for a far infrared electrothermal film, which belongs to an external thermoelectric device, that is, the heat of the far infrared electrothermal film is radiated outwards, the substrate 1 should also have low thermal conductivity so as to prevent the heat generated by the graphene heating layer 5 from being diffused out of the substrate 1; the elastic modulus characterizes the resistance of the material to deformation, and the larger the modulus, the more rigid the material and the less flexible the material.
Alternatively, the substrate 1 may be a rigid material, for example, the substrate 1 is an insulating ceramic or an insulating metal, and the rigidity of the substrate 1 determines the rigidity of the far infrared electrothermal film, such rigid far infrared electrothermal film may be applied to electric heaters such as an electric heating plate, a health preserving cup mat, and an induction cooker.
Optionally, the substrate 1 may also be made of a flexible material, and the flexibility of the substrate 1 determines the flexibility of the far infrared electrothermal film, for example, the substrate 1 may be made of polyimide, polyethylene terephthalate, polyethylene naphthalate, epoxy resin material, and the like, and such a flexible far infrared electrothermal film may be applied to a floor heating, a neck warmer, a toilet seat heating, and other scenes.
Specifically, insulating layer 3's effect prevents that graphite alkene from generating heat the heat that layer 5 produced to conduction to basement 1, can further reduce graphite alkene through setting up insulating layer 3 and generate heat the calorific loss of layer 5, improves the efficiency of generating heat of far infrared electric heat membrane.
Alternatively, the insulation layer 3 may be any one of glass fiber, asbestos, rock wool, silicate, polystyrene board, aerogel blanket or vacuum board. Specifically, the polystyrene board, called as EPS board, not only has good heat preservation effect, but also has moderate price, and the only defect is insufficient strength, thus being applicable to flexible far infrared electrothermal films. Although the heat preservation effect of the rock wool board is not good, the rock wool board has the effects of water resistance, flame retardance and the like. The aerogel felt has the heat conductivity coefficient of 0.018W/(K.m) at normal temperature, the thickness of 2 mm-10 mm and white or blue color, is suitable for being applied to a flexible far infrared electrothermal film, can be made into a rigid plate material according to requirements, and is suitable for a rigid far infrared electrothermal film.
Specifically, graphite alkene layer 5 that generates heat is the core layer of far infrared electric heat membrane, and graphite alkene layer 5 that generates heat connects the power, produces the heat, and graphite alkene has good electrically conductive, heat conductivility. The graphene far infrared electrothermal film provided by the embodiment of the utility model can promote and improve blood circulation and far infrared rays to penetrate into subcutaneous tissues of human bodies, so that the temperature of subcutaneous deep skin rises, capillaries are expanded, blood circulation is promoted, enzymes are revived, and blood and cell tissue metabolism is strengthened; the body activity can be enhanced, the far infrared ray deep penetration force of the graphene electrothermal film can reach the deep part of a muscle joint, so that the body is internally warm, muscles are relaxed, the oxygen and nutrient exchange of a capillary network is driven, fatigue substances, lactic acid and other aging wastes accumulated in the body are removed, and the effects of eliminating internal swelling and relieving ache are excellent.
Optionally, the thickness of the graphene heating layer 5 is 20-40 um. Preferably, the thickness of the graphene heat generating layer 5 is 30 um.
Optionally, the utility model discloses far infrared electric heat membrane is through adding polypyrrole in graphite alkene layer 5 that generates heat, and polypyrrole is conducting polymer matter, forms through pyrrole monomer polymerization, improves graphite alkene layer 5's that generates heat conductivity to improve the efficiency of generating heat, polypyrrole is nontoxic, guarantees the security of far infrared electric heat membrane.
Optionally, the graphene heating layer 5 further comprises 5% -10% of silver oxide, the silver oxide is usually used as an electrode material of a silver oxide battery, the conductivity is good, the conductivity of the graphene heating layer 5 is further improved by adding the silver oxide, and the heating efficiency is improved.
Optionally, the graphene heating layer 5 further comprises 5% -20% of manganese oxide and/or zinc oxide, and the manganese oxide and the zinc oxide are negative temperature coefficient thermistors, and the resistance value of the thermistors decreases with the increase of temperature. Because graphite alkene generates heat layer 5 and can produce higher temperature at the circular telegram in-process of generating heat to external radiation can make graphite alkene generate heat layer 5 still have good electric conductivity when work produces the high temperature through adding manganese oxide and/or zinc oxide, improves the efficiency of generating heat, improves the reliability of far infrared electric heat membrane, extension device life.
Optionally, the graphene heating layer 5 further comprises 10% -20% of boron carbide and/or boron nitride and/or boron phosphide. Boron carbide, boron nitride and boron phosphide are high temperature resistant materials, and the reliability of the device can be improved by adding the high temperature resistant materials to the graphene heating layer 5, so that the heat resistance of the far infrared electrothermal film is improved, spontaneous combustion is prevented, and the device is not easy to damage under the high-temperature working condition.
Optionally, the curing agent is one or more of fluoboric acid and cadmium chloride.
Optionally, the dispersant is a low molecular wax, or 3-aminopropyltriethoxysilane.
Optionally, the leveling agent is one or a mixture of two of an organic silicon leveling agent and an acrylic leveling agent.
Specifically, insulating layer 7 sets up on graphite alkene layer 5 that generates heat to improve far infrared electrothermal film's insulating properties, prevent to take place the electric leakage condition, improve far infrared electrothermal film's security. Alternatively, the insulating layer 7 is aramid, which has good insulating ability.
It is specific, through setting up waterproof layer 9 on insulating layer 7 to waterproof layer 9 wraps up the side of far infrared electric heat membrane, makes the utility model discloses the far infrared electric heat membrane not only can be waterproof in the front, but also can improve the waterproof performance of side, improves the whole waterproof performance of product, makes the utility model discloses far infrared electric heat membrane bubble water does not damage.
Preferably, the thickness of waterproof layer 9 is 10~30um, and waterproof performance is good, and practices thrift the cost.
Specifically, the protective layer 11 is used for preventing the far infrared electrothermal film from being scratched to influence the performance of the device, and if the protective layer 11 is not arranged, the outer waterproof layer 9 is scratched to lose the waterproof capability, so that the waterproof performance of the far infrared electrothermal film is reduced.
The utility model discloses still put forward a preparation method of far infrared electrothermal film, please refer to fig. 2, include:
providing a substrate, wherein the substrate is provided with an upper surface and a lower surface;
bonding a heat insulation layer on the upper surface of the substrate;
weighing 15-40% of graphene, 10-30% of polypyrrole, 5-15% of dispersing agent, 10-20% of curing agent and 5-10% of flatting agent according to the mass fraction ratio, and mixing the weighed components to prepare slurry;
attaching the prepared slurry to the heat insulation layer to obtain a graphene heating layer;
bonding an insulating layer on the graphene heating layer;
waterproof layers are coated on the insulating layer and the side face of the far infrared electrothermal film;
and a protective layer is arranged on the waterproof layer.
Specifically, the substrate serves as a carrier to support the far infrared electrothermal film, and the substrate is generally selected in consideration of insulation, thermal conductivity and elastic modulus. The substrate should have good insulating property to ensure that a good carrier passage is formed in the graphene heating layer; for a far infrared electrothermal film, which belongs to an external thermoelectric device, namely, the heat of the far infrared electrothermal film is radiated outwards, the substrate also has low heat conductivity so as to prevent the heat generated by the graphene heating layer from being diffused out of the substrate; the elastic modulus characterizes the resistance of the material to deformation, and the larger the modulus, the more rigid the material and the less flexible the material.
Alternatively, the substrate may be a rigid material, for example, the substrate is an insulating ceramic or an insulating metal, and the rigidity of the substrate determines the rigidity of the far infrared electrothermal film, so that the rigid far infrared electrothermal film can be applied to electric heaters such as an electric heating plate, a health preserving cup mat and an induction cooker.
Optionally, the substrate may also be made of a flexible material, and the flexibility of the substrate determines the flexibility of the far infrared electrothermal film, for example, the substrate may be made of polyimide, polyethylene terephthalate, polyethylene naphthalate, epoxy resin material, and the like, and the flexible far infrared electrothermal film may be applied to heating of a floor heating system, a neck warmer, a toilet seat, and the like.
Specifically, the effect of insulating layer prevents that graphite alkene from generating heat the heat that the layer produced and to the conduction of basement, can further reduce graphite alkene through setting up the insulating layer and generate heat the calorific loss on layer, improves the efficiency of generating heat of far infrared electric heat membrane.
Alternatively, the insulation layer may be any one of fiberglass, asbestos, rock wool, silicate, polystyrene board, aerogel blanket, or vacuum board. Specifically, the polystyrene board, called as EPS board, not only has good heat preservation effect, but also has moderate price, and the only defect is insufficient strength, thus being applicable to flexible far infrared electrothermal films. Although the heat preservation effect of the rock wool board is not good, the rock wool board has the effects of water resistance, flame retardance and the like. The aerogel felt has the heat conductivity coefficient of 0.018W/(K.m) at normal temperature, the thickness of 2 mm-10 mm and white or blue color, is suitable for being applied to a flexible far infrared electrothermal film, can be made into a rigid plate material according to requirements, and is suitable for a rigid far infrared electrothermal film.
Specifically, graphite alkene layer that generates heat is the core layer of far infrared electric heat membrane, and graphite alkene layer that generates heat connects the power, produces the heat, and graphite alkene has good electrically conductive, heat conductivility. The graphene far infrared electrothermal film obtained by the preparation method of the far infrared electrothermal film can promote and improve blood circulation far infrared rays to penetrate into subcutaneous tissues of a human body, so that the temperature of subcutaneous deep skin rises, capillaries are expanded, blood circulation is promoted, enzymes are revived, and metabolism of blood and cell tissues is strengthened; the body activity can be enhanced, the far infrared ray deep penetration force of the graphene electrothermal film can reach the deep part of a muscle joint, so that the body is internally warm, muscles are relaxed, the oxygen and nutrient exchange of a capillary network is driven, fatigue substances, lactic acid and other aging wastes accumulated in the body are removed, and the effects of eliminating internal swelling and relieving ache are excellent.
Optionally, the prepared slurry is attached to a substrate using a spray, deposition or evaporation method. The thickness of graphite alkene layer that generates heat is 20~40 um. Preferentially, the thickness of the graphene heating layer is 30 um.
Optionally, the utility model discloses far infrared electrothermal film's preparation method is through adding polypyrrole in graphite alkene layer that generates heat, and polypyrrole is conducting polymer matter, forms through pyrrole monomer polymerization, improves graphite alkene layer that generates heat's electric conductivity to improve the efficiency of generating heat, polypyrrole is nontoxic, guarantees far infrared electrothermal film's security.
Optionally, the graphene heating layer further comprises 5% -10% of silver oxide, the silver oxide is usually used as an electrode material of a silver oxide battery, the conductivity is good, the conductivity of the graphene heating layer is further improved by adding the silver oxide, and the heating efficiency is improved.
Optionally, the graphene heating layer further comprises 5% -20% of manganese oxide and/or zinc oxide, the manganese oxide and the zinc oxide are negative temperature coefficient thermistors, and the resistance value of the thermistors decreases with the increase of temperature. Because graphite alkene generates heat the layer and can produce higher temperature at the circular telegram in-process that generates heat to external radiation can make graphite alkene generate heat the layer still have good electric conductivity when work produces the high temperature through adding manganese oxide and/or zinc oxide, improves the efficiency of generating heat, improves the reliability of far infrared electric heat membrane, extension device life.
Optionally, the graphene heating layer further comprises 10% -20% of boron carbide and/or boron nitride and/or boron phosphide. Boron carbide, boron nitride and boron phosphide are high temperature resistant materials, and the reliability of the device can be improved by adding the high temperature resistant materials to the graphene heating layer, so that the heat resistance of the far infrared electrothermal film is improved, spontaneous combustion is prevented, and the device is not easy to damage under the high-temperature working condition.
Optionally, the curing agent is one or more of fluoboric acid and cadmium chloride.
Optionally, the dispersant is a low molecular wax or 3-aminopropyltriethoxysilane.
Optionally, the leveling agent is one or a mixture of two of an organic silicon leveling agent and an acrylic leveling agent.
Specifically, the insulating layer sets up on the graphite alkene layer that generates heat to improve far infrared electrothermal film's insulating properties, prevent to take place the electric leakage condition, improve far infrared electrothermal film's security. Optionally, the insulating layer is aramid, which has good insulating ability.
It is specific, through setting up the waterproof layer on the insulating layer to the side of waterproof layer parcel far infrared electrothermal film makes the utility model discloses the far infrared electrothermal film that far infrared electrothermal film preparation method obtained not only can be waterproof in the front, but also can improve the waterproof performance of side, improves the whole waterproof performance of product, makes the utility model discloses the far infrared electrothermal film bubble water that obtains does not damage.
Preferably, the thickness of waterproof layer is 10~30um, and waterproof performance is good, and practices thrift the cost.
Specifically, the protective layer is used for preventing the far infrared electric heating film from being scratched to influence the performance of devices, and if the protective layer is not arranged, the outer waterproof layer is scratched to lose the waterproof capability, so that the waterproof performance of the far infrared electric heating film is reduced.
The utility model discloses still provide an electric heater, the preparation has the far infrared electric heat membrane of above-mentioned arbitrary embodiment on this electric heater, and this far infrared electric heat membrane's concrete structure refers to above-mentioned embodiment, because this electric heater has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, no longer gives unnecessary detail here.
Embodiments of the present invention will be described in detail below with reference to specific examples, but those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The preparation method of the far infrared electrothermal film provided by the embodiment is as follows:
providing a substrate, wherein the substrate is provided with an upper surface and a lower surface;
bonding a heat insulation layer on the upper surface of the substrate;
weighing 15% of graphene, 10% of polypyrrole, 5% of a dispersing agent, 10% of a curing agent and 5% of a flatting agent according to the mass fraction ratio, and mixing the weighed components to prepare slurry;
depositing the prepared slurry on the heat insulation layer to obtain a graphene heating layer;
bonding an insulating layer on the graphene heating layer;
waterproof layers are coated on the insulating layer and the side face of the far infrared electrothermal film, and the thickness of each waterproof layer is 10 microns;
and arranging a protective layer on the waterproof layer to prepare the far infrared electrothermal film of the embodiment.
Example 2
The difference between this embodiment and embodiment 1 is only that the graphene heating layer is composed of, by mass, 25% of graphene, 20% of polypyrrole, 10% of a dispersant, 15% of a curing agent, and 7% of a leveling agent, and the thickness of the waterproof layer is 30um, and other steps are the same as those in embodiment 1 and are not described again.
Example 3
The difference between this embodiment and embodiment 1 is only that the graphene heating layer is composed of, by mass, 40% of graphene, 30% of polypyrrole, 15% of a dispersant, 20% of a curing agent, and 10% of a leveling agent, and the waterproof layer is only disposed on the insulating layer, and is not wrapped around the side surface of the far infrared electrothermal film, and other steps are the same as those in embodiment 1, and are not described herein again.
Example 4
The difference between this embodiment and embodiment 1 is that the graphene exothermic layer further includes 5% silver oxide by mass fraction, and other steps are the same as those in embodiment 1 and are not described herein again.
Example 5
The difference between this embodiment and embodiment 3 is that the graphene exothermic layer further includes 10% of silver oxide and 20% of boron carbide according to the mass fraction ratio, and other steps are the same as those in embodiment 3 and are not described herein again.
Example 6
The difference between this embodiment and embodiment 4 is that the graphene exothermic layer further includes 5% manganese oxide by mass fraction, and other steps are the same as those in embodiment 4 and are not described herein again.
Example 7
The difference between this embodiment and embodiment 4 is that the graphene exothermic layer further includes 20% manganese oxide according to the mass fraction ratio, and other steps are the same as those in embodiment 4 and are not described herein again.
Example 8
The difference between this embodiment and embodiment 5 is that the graphene exothermic layer further includes 5% manganese oxide by mass fraction, and other steps are the same as those in embodiment 5 and are not described herein again.
Example 9
The difference between this embodiment and embodiment 1 is that the graphene exothermic layer further includes 15% boron carbide according to the mass fraction ratio, and other steps are the same as those in embodiment 1 and are not described herein again.
Example 10
The difference between this embodiment and embodiment 6 is that the graphene exothermic layer further includes 15% boron carbide according to the mass fraction ratio, and other steps are the same as those in embodiment 6 and are not described herein again.
Test example 1 Water resistance test
The waterproof grade test is carried out on the far infrared electrothermal film of the embodiment according to the method specified in GB 4208-.
Experimental example 2 electric-thermal radiation conversion rate experiment
The electric-thermal radiation conversion rate experiment is carried out on the far infrared electrothermal film according to GB/T7287-.
Test example 3 Heat resistance and flame resistance test
The far infrared electrothermal film of the above embodiment is subjected to heat-resistant and flame-resistant experiments according to the method prescribed in chapter thirtieth of GB 4706.82-2008 'Special requirements for heating film heating elements for safe rooms of household and similar appliances'.
Results of the experiment
The test results are shown in table 1, and table 1 shows the performance test results of the far infrared electrothermal films of the above examples, including the waterproof grade results, the electric-thermal radiation conversion rate results, and the heat resistance results.
Can derive from table 1, the utility model discloses a when the waterproof layer of far infrared electrothermal film is 10um thickness, the waterproof grade of far infrared electrothermal film is IPX 7, even the far infrared electrothermal film soaks inside water also can not get into the device under the condition of regulation promptly, and waterproof performance is good. When the waterproof layer is 30um thick, the waterproof grade of far infrared electric heat membrane is IPX 9, and this infrared electric heat membrane can use under the humidity environment that relative humidity is greater than 90% promptly equally, and waterproof performance is the best. And when the waterproof layer in embodiment 3 did not wrap up the side of far infrared electric heat membrane, its waterproof grade is IPX 3, only can protect the influence of the ascending water of vertical direction promptly, can not all protect the water of arbitrary direction, and waterproof performance is relatively poor.
The electric-thermal radiation conversion rate of the far infrared electrothermal film is related to the conductivity of the heating layer, and is seen from table 1. in the scheme of the utility model, when the graphene heating layer comprises graphene and polypyrrole, the electric-thermal radiation conversion rate can reach more than 80%, and along with the increase of the mass fraction of the graphene and the polypyrrole, the electric-thermal radiation conversion rate is increased. When the graphene heating layer comprises graphene, polypyrrole and silver oxide, the electric-thermal radiation conversion rate is increased compared with a far infrared electric heating film without the silver oxide, and the electric-thermal radiation conversion rate is also increased along with the increase of the mass fraction of the silver oxide. When the graphene heating layer comprises graphene, polypyrrole, silver oxide and manganese oxide, the electric-thermal radiation conversion rate is increased compared with a far infrared electrothermal film which does not comprise silver oxide and manganese oxide, and the electric-thermal radiation conversion rate is also increased along with the increase of the mass fraction of the silver oxide and the manganese oxide.
Boron carbide has increased the heat-resisting temperature of far infrared electrothermal film as high temperature resistant material, the utility model discloses the scheme is through setting up the insulating layer for the heat-resisting temperature of far infrared electrothermal film reaches more than 150 ℃, however when the graphite alkene generates heat the layer and adds boron carbide, for example embodiment 5, embodiment 8, embodiment 9 and embodiment 10, the heat-resisting temperature of corresponding far infrared electrothermal film can reach nearly 180 ℃, has improved heat-resisting, the fire behaviour of far infrared electrothermal film greatly.
Above experimental result proves, the embodiment of the utility model provides a far infrared electric heat membrane is through improving its structure to and the formula on graphite alkene layer that generates heat, improved the performance of far infrared electric heat membrane greatly.
TABLE 1 test results of far infrared electrothermal film performance of each example
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (6)
1. A far infrared electrothermal film is characterized by comprising:
a substrate having an upper surface and a lower surface;
the heat insulation layer is arranged on the upper surface of the substrate;
the graphene heating layer is arranged on the heat insulation layer;
the insulating layer is arranged on the graphene heating layer;
the waterproof layer is arranged on the insulating layer and wraps the side face of the far infrared electrothermal film;
and the protective layer is arranged on the waterproof layer.
2. The far infrared electrothermal film according to claim 1, wherein the heat insulating layer is any one of glass fiber, asbestos, rock wool, silicate, polystyrene board, aerogel blanket or vacuum board.
3. The far infrared electrothermal film according to claim 1, wherein the thickness of the graphene heating layer is 20-40 um.
4. The far infrared electrothermal film according to claim 3, wherein the thickness of the waterproof layer is 10 to 30 um.
5. The far infrared electrothermal film according to claim 1, wherein the substrate is an insulating ceramic or an insulating metal.
6. An electric heater on which a far infrared electrothermal film according to any one of claims 1 to 5 is fabricated.
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| CN202022570020.6U CN213586336U (en) | 2020-11-09 | 2020-11-09 | Far infrared electrothermal film and electric heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387573A (en) * | 2022-08-23 | 2022-11-25 | 东北林业大学 | Novel graphite alkene electrical heating wood composite energy storage floor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387573A (en) * | 2022-08-23 | 2022-11-25 | 东北林业大学 | Novel graphite alkene electrical heating wood composite energy storage floor |
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