CN114143920B - Low-voltage electric heating veneer and preparation method thereof - Google Patents
Low-voltage electric heating veneer and preparation method thereof Download PDFInfo
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- CN114143920B CN114143920B CN202111227952.3A CN202111227952A CN114143920B CN 114143920 B CN114143920 B CN 114143920B CN 202111227952 A CN202111227952 A CN 202111227952A CN 114143920 B CN114143920 B CN 114143920B
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- 238000005485 electric heating Methods 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000004020 conductor Substances 0.000 claims abstract description 70
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000010438 heat treatment Methods 0.000 claims abstract description 54
- 239000003292 glue Substances 0.000 claims abstract description 42
- 229920001046 Nanocellulose Polymers 0.000 claims abstract description 34
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 34
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 33
- 239000003063 flame retardant Substances 0.000 claims description 24
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 23
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- 238000013329 compounding Methods 0.000 claims description 12
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- 150000007974 melamines Chemical class 0.000 claims description 10
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000011094 fiberboard Substances 0.000 claims description 8
- 239000011120 plywood Substances 0.000 claims description 8
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 8
- 239000011118 polyvinyl acetate Substances 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 7
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 7
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical group [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
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- 239000004917 carbon fiber Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
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- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 3
- IWLBIFVMPLUHLK-UHFFFAOYSA-N azane;formaldehyde Chemical compound N.O=C IWLBIFVMPLUHLK-UHFFFAOYSA-N 0.000 description 3
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/03—Electrodes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
- H05B3/145—Carbon only, e.g. carbon black, graphite
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2301/02—Cellulose; Modified cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/085—Copper
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/041—Carbon nanotubes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
The application discloses a low-voltage electric heating veneer and a preparation method thereof, the veneer comprises a panel, a bottom plate, a heat insulation layer, a low-voltage electric heating film and a conductor, wherein the outer surfaces of the low-voltage electric heating film and the conductor are coated with insulating waterproof glue layers, so that the product is safer and more reliable, the outer surfaces of the panel and the bottom plate are provided with heat-resistant veneer layers, the low-voltage electric heating film comprises nanocellulose, carbon nanotubes, graphene and conductive nano metals which are mixed to prepare the veneer, the veneer is prepared by the steps of high-speed stirring dispersion, ultrasonic treatment, vacuum filtration treatment, dipping drying treatment and the like, the product is heated up quickly, generates heat uniformly, stores energy and has good electric heat stability, does not damage the internal structure of the veneer, does not need external wiring, can be used after being connected with electricity, can safely and stably pass through current of 36V or below 6A, when the current is electrified for 12-36V, the heating temperature reaches 40 ℃ and the temperature difference of each test point is not more than 1 ℃, the production process is simple and reasonable, the cost is low, the performance meets the national standard requirements, and meanwhile, the veneer has the functions of conductive heating and far infrared health care.
Description
Technical Field
The application belongs to the technical field of plates, and particularly relates to a low-voltage electric heating veneer and a preparation method thereof.
Background
In order to meet the requirements of the home market on functionalization, intellectualization, individuation and environmental protection, the functions of sound, light, electricity, magnetism, heat and the like are endowed on the artificial board and the facing artificial board, and are research hot spots and attention points of the industry.
The wood composite material has uniform and efficient electric heating function, can be applied to indoor heating, such as wall heating, floor heating, self-heating small furniture and mobile heaters, can also be used for infrared sterilization, dehumidification drying, mildew prevention, heating and heat preservation and the like, adopts electric heating, is clean and sanitary, comfortable, energy-saving, easy to install and maintain, has good latent heat performance, and has far infrared health care function, so that the wood electric heating composite material has wide industrialization and market prospect as a novel material and product in heating and wood processing industries.
The heating plate on the current market has the following defects:
firstly, a large amount of carbon nanotubes or graphene is added into conductive slurry to improve conductivity so as to reduce resistance, thereby improving heating efficiency, but the addition of the carbon nanotubes and the graphene requires an additional chemical treatment process, which not only results in relatively higher preparation cost, but also causes more environmental pollution problems;
secondly, the commonly used connecting materials of the conductive film clamped by the heating plate in the prior art are nondegradable acrylic resin, polyurethane resin and the like, so that the environment-friendly performance is poor;
thirdly, the heating plate manufactured by the carbon fiber heating paper, the carbon crystal low-voltage heating film and the carbon fiber cable is mainly electrified and heated by 220V voltage, so that potential leakage safety risks exist, popularization and use are influenced, the heating plate manufactured by the carbon fiber is linear and high in local temperature is easy to cause, and the temperature difference of a heating area is large;
fourthly, when the existing low-voltage heating veneer is used, additional wiring is needed, the heating is slower, the heating is uneven, the electric heating stability is poor, the insulation waterproof performance is general, the resistivity is high, the power density is small, the low-voltage work is not facilitated, the internal structure of the plate is easy to damage after long-term use, and potential safety hazards exist.
Disclosure of Invention
Aiming at the problems in the related art, the application provides a low-voltage electric heating veneer and a preparation method thereof, which are used for overcoming the technical problems existing in the prior related art, providing a new solution for realizing the functions of electric conduction, heating, dehumidification and the like on a heating plate, providing a power supply platform for intelligent product application, simplifying a wiring system, simplifying and reasonable process, effectively improving construction efficiency and reducing cost.
The technical scheme of the application is realized as follows:
the utility model provides a low pressure electrothermal veneer, includes panel, bottom plate, insulating layer and low pressure electrothermal film, the conductor has been laid to low pressure electrothermal film, the surface coating of low pressure electrothermal film and conductor has insulating waterproof glue film, improves insulating waterproof performance, low pressure electrothermal film and conductor set up in between panel and the bottom plate, the insulating layer sets up between low pressure electrothermal film and the bottom plate, realizes one-way heating, makes the product safer and more reliable, and life is longer, the surface of panel and bottom plate is provided with heat-resistant finish coat, heat-resistant finish coat is equipped with the position identification of low pressure electrothermal film and conductor, panel, bottom plate, insulating layer and low pressure electrothermal film pass through high temperature resistant gluing agent and form overall structure.
The low-voltage electrothermal film comprises 40-70 parts by weight of nanocellulose, 5-25 parts by weight of carbon nanotubes, 5-25 parts by weight of graphene and 5-20 parts by weight of conductive nano metal.
The graphene has excellent electric and heat conduction properties, and the electric heating mode in the prior art is to prepare the graphene into slurry, wherein the slurry generally contains undegradable components and is coated on a substrate with higher hardness, so that the planar heating piezoelectric thermal film is prepared. The defects of the low-voltage electrothermal film are as follows: firstly, graphene is required to be loaded on a substrate with higher hardness to keep the resistance relatively stable, so that the high-hardness and thick piezoelectric hot films are easy to break when impacted by external force, and the production and transportation of the plates are extremely unfavorable; secondly, the layered structure of the graphene enables the specific surface area of the graphene to be actively large, and has excellent heat conduction efficiency, but only weak interaction force, namely Van der Waals force exists between the graphene, so that the excellent heat conduction efficiency of the graphene is mainly reflected in transverse heat conduction, and the longitudinal heat conduction rate is lower.
Firstly, in order to discard non-degradable slurry components and solve the problem of high hardness and easy breakage, the application adopts the nanocellulose and the carbon nano tube to form a bendable winding system, the graphene is firmly and uniformly clamped in the system, the resistor can still be kept relatively stable and does not need to be supported by a substrate, and the graphene is not required to be prepared into slurry naturally because the substrate is not required to be supported, so that the environment-friendly purpose of the application is realized; secondly, adding conductive nano metal, wherein the conductive nano metal can be mixed between the graphene layers, so that the longitudinal heat conduction rate of the graphene layers is effectively enhanced.
The carbon nano tube has relatively excellent electric conduction and heat conduction properties, has a very large length-diameter ratio, can be self-assembled into a network-shaped film, has excellent flexibility and mechanical strength, and can be bent at will and maintain stable electric properties. The reason why the carbon nanotubes are not used singly in the present application is that: the manufacturing of the plate does not pursue too high softness, but needs to have higher strength and stiffness under the condition of difficult fracture, so the graphene is clamped by utilizing the self-winding characteristic of the carbon nano tube, and the graphene is not only difficult to fracture (realized by the carbon nano tube), but also has higher strength and stiffness (realized by the graphene).
Because the characteristic of self-assembly of the carbon nano tube is insufficient to clamp the graphene very firmly, the application introduces the degradable nano cellulose, enhances the nano cellulose in a disperse phase manner, can slide along the gaps and the surfaces of the carbon nano tube and the graphene and establishes bond connection, and ensures the stability and the compactness of the integral connection.
In summary, the low-voltage electric heating veneer has excellent electric conduction and heat conduction properties, overcomes the defects of environmental protection and substrate requirement in the preparation process of the graphene heating film, and has the advantages of difficult fracture, high strength and high stiffness; compared with the linear heating carbon fiber, the low-voltage electrothermal film disclosed by the application is planar to heat, so that local overhigh temperature can not be caused, and the low-voltage electrothermal film is safer and more stable.
Preferably, the low-voltage electrothermal film further comprises a flame retardant, so that the use safety of the product is further ensured. Preferably, the flame retardant is a phosphorus flame retardant and/or a nitrogen-phosphorus composite flame retardant, both of which have good stability to light, and generate less toxic gas and corrosive gas than halogen flame retardants, the phosphorus flame retardant can plasticize in addition to flame retardance, and the quality of the low-voltage electrothermal film is little or not increased, and the nitrogen-phosphorus composite flame retardant has excellent thermal stability.
Preferably, the length of the nanocellulose is 0.5-5 μm, and the diameter is 0.5-20 nm.
Preferably, the carbon nanotubes have a diameter of 5nm to 80nm, a length of 1 μm to 15 μm, a conductivity of 160s/cm or more, and a bulk density of 2.0g/cm 3 ～2.3g/cm 3 。
Preferably, the thickness of the graphene is 0.5-8 nm, the median particle diameter is 0.5-6 mu m, and the number of layers is 4-8.
Preferably, the particle size of the conductive nano metal is 50-300 nm, and specifically, the conductive nano metal is nano copper powder.
Preferably, the heat-resistant decorative layer can be formed by hot pressing, coating or compounding, and is preferably formed by hot pressing decorative paper impregnated with environment-friendly modified melamine resin, wherein the mass ratio of urea resin to melamine-formaldehyde resin in the environment-friendly modified melamine resin is 1: and 9, 3-4% of a composite additive is contained, the composite additive is formed by mixing aqueous polyurethane, methacrylic acid and silicate, the functionality of the resin can be effectively improved, the crosslinking density of a resin cured product is improved, the heat resistance of the resin is improved, and the quality problem cannot be caused by heating after the resin is cured.
Preferably, the gum dipping amount of the decorative paper is 120-180%, the volatile matter is 5-8%, the pre-curing degree is 40-60%, the formaldehyde release amount is less than or equal to 0.3mg/L, and the pressing and pasting applicability, the product quality and the environmental protection performance are ensured.
Preferably, the heat insulation layer is made of a high-temperature-resistant heat insulation material, the high-temperature-resistant heat insulation material is an organic high-temperature-resistant heat insulation coating or a heat insulation film, the heat insulation layer is combined with the bottom plate in a coating or gluing mode, the thickness of the heat insulation layer is not more than 0.5mm, unidirectional heating is realized, the product is safer and more reliable, and the application range is wider.
Preferably, the main components of the insulating waterproof adhesive layer are styrene-acrylic modified polyvinyl acetate double-component adhesive and isocyanate, the mass ratio of the styrene-acrylic modified polyvinyl acetate double-component adhesive to the isocyanate is 100:5-10, and the insulating waterproof adhesive layer can not only insulate water, but also ensure the bonding strength between the piezoelectric thermal film and the panel and the bottom plate.
Preferably, the bottom plate and the panel are any one or combination of artificial boards such as a shaving board, a medium-density fiberboard, an oriented shaving board, a plywood and the like, the artificial boards are of a homogeneous structure and are made of isocyanate adhesives, the structure is stable, the waterproof and heat-resistant effects are achieved, the internal structure is not damaged even if the board is heated, the thickness is 1-25 mm, and the formaldehyde release amount is less than or equal to 0.03mg/m 3 。
Preferably, the contact surface width of the piezoelectric and thermal films and the conductor is not less than 5mm.
Preferably, the conductor is made of any one of copper, iron, aluminum and other metals, has a thickness of 0.1-1 mm and a width of 5-20 mm, and ensures the conductivity and the connection convenience of the conductor.
Preferably, the thickness of the low-voltage electrothermal film is 0.05-2 mm, and the width is 30-200 mm.
The preparation method of the low-voltage electric heating veneer comprises the following steps:
(1) Pouring the nanocellulose into water for mixing to prepare nanocellulose suspension, so as to ensure that the nanocellulose suspension can fully intertwine carbon nanotubes, graphene and conductive nano metals;
(2) Pouring carbon nanotubes, graphene and conductive nano metals into the nanocellulose suspension for mixing;
(3) And (3) flattening and drying the mixed solution prepared in the step (2) to obtain the low-voltage conductive film.
Preferably, in the step (1), the addition amount of the nanocellulose accounts for 0.2-5% of the water mass, and the nanocellulose is mixed by high-speed stirring through a high-speed dispersing machine, wherein the rotating speed is 1500-2500 r/min, and the duration is 15-40 min. If the addition amount of the nanocellulose exceeds 5%, the viscosity is too high, and if the addition amount of the nanocellulose is less than 0.2%, the nanocellulose in the dispersion water is too low, and both cases are unfavorable for the nanocellulose to be interlaced and stabilize the carbon nanotubes, the graphene and the conductive nano metal.
(4) Selecting materials and designing, selecting proper materials according to actual use requirements, designing, determining specification and size of the piezoelectric heating film and the conductor, laying positions, directions, quantity, intervals and the like;
(5) Coating high-temperature resistant heat-insulating paint on the bottom plate or paving a heat-insulating film to form a heat-insulating layer, and then coating insulating waterproof glue on the heat-insulating layer, wherein the glue application amount is 150-200 g/m 2 ；
(6) The low-voltage electrothermal film and the conductor are paved and fixed on the bottom plate, the low-voltage electrothermal film and the conductor are fixed on the gluing surface of the bottom plate by using a U-shaped nail, specifically, the low-voltage electrothermal film is paved firstly, then the conductors are paved on two sides of the low-voltage electrothermal film, the width of the contact surface between the low-voltage electrothermal film and the conductor is not less than 5mm, the conductor and the low-voltage electrothermal film are fixed on the plate surface by using the U-shaped nail, one low-voltage electrothermal film is a group of every two conductors, the interval between the groups is 200-1000 mm, any one of the two conductors is an anode, and the other conductor is a cathode, so that the conductive connection mode is simplified;
(7) The panel is coated with insulating waterproof glue, and the glue application amount is 150-200 g/m 2 ；
(8) Assembling, cold pressing and compounding, wherein the gluing surface of the panel covers the low-voltage electrothermal film and the conductor, assembling and compounding, shaping in a cold press, and cold pressing technological parameters: the pressure is 13-20 MPa, the time is 2-8 hours, and the glue is ensured to be completely solidified and not layered;
(9) Forming heat-resistant finish layers on the outer surfaces of the bottom plate and the panel in a hot-pressing, coating or compounding mode, preferably adopting decorative paper impregnated with amino resin for hot-pressing, paving the decorative paper on the surface of the composite board prepared in the step (8), pressing, pasting and trimming by a hot press, and hot-pressing technological parameters: the pressure is 8-20 MPa, the temperature is 120-210 ℃ and the time is 16-350 s, and after the pressing is finished, the positions of the low-voltage electrothermal film and the conductor are marked by using non-adhesive glue or colored adhesive tape on the surface of the board, thus obtaining the low-voltage electrothermal veneer. In actual production, the adhesive can be properly adjusted according to the pressing effect, so that the product decoration effect is ensured.
Preferably, in the step (2), the carbon nanotubes, the graphene and the conductive nano metal are added under the condition that stirring is kept in the step (1), and the rotating speed is 1500-2500 r/min, and the duration is 10-30 min, so that the carbon nanotubes, the graphene and the conductive nano metal are uniformly dispersed.
Preferably, the mixed solution prepared in the step (2) is subjected to ultrasonic treatment with the power of 500-1500W for 5-20 min, so that bubbles are eliminated, and each component is uniformly distributed.
Preferably, in the step (3), the mixed solution obtained in the step (2) is subjected to vacuum filtration treatment under the pressure of 0.05-0.2 MPa for 3-8 hours to obtain the low-voltage electrothermal film on the filter membrane, the low-voltage electrothermal film is soaked in absolute ethyl alcohol for 3-8 minutes, and then the low-voltage electrothermal film and the filter membrane are separated and dried in a mechanical stripping mode.
Preferably, the low-voltage electrothermal film prepared in the step (3) is subjected to impregnation drying treatment by adopting a flame retardant solution.
Preferably, the mass ratio of the flame retardant in the flame retardant solution is 10-25%, the dipping treatment time is 20-60S, the drying treatment temperature is 65-80 ℃, and the drying treatment time is 1.5-2.5 h.
The application has the beneficial effects that:
(1) The low-voltage electrothermal film is prepared by combining carbon nano tubes, graphene, nanocellulose, nano copper powder and water in a specific proportion, and performing the steps of high-speed stirring dispersion, ultrasonic treatment, vacuum filtration treatment, dipping drying treatment and the like, and the product is fast in heating and temperature rise, uniform in heating, energy-saving, good in electrothermal stability and free from damaging the internal structure of a plate;
(2) The low-voltage electrothermal film is subjected to flame-retardant dipping treatment and is covered by the insulating waterproof adhesive layer, the used adhesive is high-temperature-resistant adhesive, and the insulating layer is arranged for unidirectional heating, so that the effect of stable heating of the low-voltage electrothermal veneer is realized, and the low-voltage electrothermal film is safe and reliable;
(3) The low-voltage electrothermal decorative panel disclosed by the application has no organic solvent addition, and the decorative paper, the glue and the artificial board are all environment-friendly high-grade materials, so that the low-voltage electrothermal decorative panel is environment-friendly and healthy;
(4) The low-voltage electric heating veneer provided by the application is free from external wiring and can be used immediately after being connected with electricity, so that wireless heating and temperature rise are realized, a wiring system is simplified, a power supply platform can be provided for intelligent home application while heating, the construction and maintenance are convenient and quick, the construction efficiency is improved, the cost is reduced, and the development of intelligent home is effectively promoted;
(5) The low-voltage electric heating veneer can safely and stably pass current of below 36V and 6A, when the current is 12-36V, the heating temperature reaches 40 ℃ for 0.5-1.5 h, and the temperature difference of each test point is not more than 1 ℃;
(6) The application has simple and reasonable production process and low cost, and the prepared product has good decorative effect, meets the national standard requirement, and simultaneously has the functions of conducting heat and far infrared health care.
Drawings
Fig. 1 is a schematic structural view of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be understood that 18 is a term of art, i.e., 18 mm, and that the terms of "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. refer to the orientation or positional relationship based on the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the application.
Example 1
The manufacturing method of the 18 cm low-voltage electric facing chipboard comprises the following steps:
A. preparation of a piezoelectric thermal film:
A1. 2g of nano cellulose with the length of 3 mu m and the diameter of 10nm and 1000g of water are poured into a high-speed dispersing machine to be stirred and dispersed for 30min at a high speed of 1600r/min, so as to obtain nano cellulose suspension;
A2. under the condition of stirring, continuously adding 1.25g of nano cellulose suspension with the diameter of 50nm, the length of 8 mu m, the conductivity of 260s/cm and the bulk density of 2.2g/cm 3 1.25g of carbon nano tube with the thickness of 4nm, the median grain diameter of 3 mu m, the number of layers of 6 layers of graphene and 1g of nano copper powder with the grain diameter of 200nm are stirred at a high speed for 20min to be uniformly dispersed, so as to obtain a mixed solution A;
A3. carrying out ultrasonic treatment on the mixed solution A to obtain mixed solution B, wherein the power of ultrasonic treatment is 700W, and the time is 15min;
A4. carrying out vacuum suction filtration on the mixed solution B to obtain a nano carbon material piezoelectric heating film on the filter film, wherein the vacuum suction filtration treatment pressure is 0.08MPa, and the time is 6h;
A5. soaking the nano carbon material piezoelectric and heating film on the filter membrane in absolute ethyl alcohol for 5min, and then separating the nano carbon material piezoelectric and heating film from the filter membrane by using a mechanical stripping mode;
A6. the prepared nano carbon material low-voltage electrothermal film is subjected to dipping and drying treatment by adopting a nitrogen-phosphorus composite flame retardant solution, wherein the mass ratio of the flame retardant in the flame retardant solution is 25%, the dipping treatment time is 30S, the drying treatment temperature is 75 ℃, and the drying treatment time is 2h; the piezoelectric heating film with the thickness of 0.05-2 mm and the width of 30-200 mm is prepared.
B. Selecting and designing materials, wherein the heat-resistant finish coat is formed by hot pressing decorative paper impregnated with environment-friendly modified melamine resin, and the mass ratio of urea-formaldehyde resin to amine-formaldehyde resin in the environment-friendly modified melamine resin is 1:9, the addition amount of the composite additive is 3%, the gum dipping amount of the decorative paper is 150%, the volatile matter is 6%, the estimated degree is 50%, and the formaldehyde release amount is 0.1mg/L; the bottom plate and the face plate are moisture-proof homogeneous shaving board with the thickness of 9mm and made of isocyanate adhesive, and the formaldehyde release amount is 0.014mg/m 3 The conductor is a copper bar with the thickness of 0.3mm and the width of 15mm, the thickness of the piezoelectric heat film is 0.15mm, and the width is 100mm; the piezoelectric heating film and the conductor are longitudinally or transversely laid in the bottom plate and the panelAnd (3) the room(s).
C. The base plate is coated with high-temperature resistant heat-insulating coating with the thickness of 0.3mm to form a heat-insulating layer, then the heat-insulating layer is coated with insulating waterproof glue, the main components of the glue are styrene-acrylic modified polyvinyl acetate two-component glue and isocyanate, the mass ratio of the two is 100:5, and the glue application amount is 160g/m 2 。
D. Laying a low-voltage electrothermal film on the gluing surface of the bottom plate, then laying conductors on two sides of the low-voltage electrothermal film, wherein the width of the contact surface of the conductors is 6mm, fixing the conductors and the low-voltage electrothermal film on the plate surface through a U-shaped nail, wherein one low-voltage electrothermal film is a group of every two conductors, the interval between the groups is 600mm, any one of the two conductors is an anode, and the other conductor is a cathode;
E. and C, coating insulating waterproof glue on the panel, wherein the glue and the glue applying amount are consistent with those in the step C.
F. And (3) cold-pressing and compounding the assembly, covering the gluing surface of the panel on the low-voltage electrothermal film and the conductor, and shaping by a cold press to obtain the 18-centimeter low-voltage electrothermal chipboard, wherein the cold-pressing pressure is 15MPa and the time is 4 hours.
And G, paving decorative paper on the surface of the low-voltage electric heating shaving board, pressing and trimming the decorative paper by a hot press, and marking the positions of the low-voltage electric heating film and the conductors on the board surface by using non-adhesive or colored adhesive tapes to obtain the 18-centimeter low-voltage electric heating facing shaving board, wherein the pressure is 15MPa, the temperature is 200 ℃ and the time is 23s.
The 18 centi low-voltage electric heating facing shaving board that this embodiment made is including panel 7, bottom plate 2, insulating layer 3 with low pressure electric heating film 6, conductor 5 has been laid to low pressure electric heating film 6, the surface coating of low pressure electric heating film 6 and conductor 5 has insulating waterproof glue film 4, low pressure electric heating film 6 and conductor 5 set up in between panel 7 and the bottom plate 2, insulating layer 3 sets up between low pressure electric heating film 6 and bottom plate 2, the surface of panel 7 and bottom plate 2 is provided with heat-resisting finish coat 1.
Example 2
The manufacturing method of the 18 cm low-voltage electric heating veneer plywood comprises the following steps:
A. preparation of a piezoelectric thermal film:
A1. 26g of nanocellulose with the length of 3 mu m and the diameter of 10nm and 1000g of water are poured into a high-speed dispersing machine to be stirred and dispersed at a high speed of 1600r/min for 30min, so as to obtain nanocellulose suspension;
A2. under the condition of stirring, adding 7.05g of nano cellulose suspension with the diameter of 50nm, the length of 8 mu m and the conductivity of 260s/cm and the bulk density of 2.2g/cm into the nano cellulose suspension 3 7.05g of carbon nano tube with the thickness of 4nm, the median grain diameter of 3 mu m, the number of layers of 6 layers of graphene and 6.25g of nano copper powder with the grain diameter of 200nm are stirred at a high speed for 20min to be uniformly dispersed, so as to obtain a mixed solution A;
A3. carrying out ultrasonic treatment on the mixed solution A to obtain mixed solution B, wherein the power of ultrasonic treatment is 700W, and the time is 15min;
A4. carrying out vacuum suction filtration on the mixed solution B to obtain a nano carbon material piezoelectric heating film on the filter film, wherein the vacuum suction filtration treatment pressure is 0.08MPa, and the time is 6h;
A5. soaking the nano carbon material piezoelectric and heating film on the filter membrane in absolute ethyl alcohol for 5min, and then separating the nano carbon material piezoelectric and heating film from the filter membrane by using a mechanical stripping mode;
A6. the prepared nano carbon material low-voltage electrothermal film is subjected to dipping and drying treatment by adopting a nitrogen-phosphorus composite flame retardant solution, wherein the mass ratio of the flame retardant in the flame retardant solution is 20%, the dipping treatment time is 30S, the drying treatment temperature is 75 ℃, and the drying treatment time is 2h; the piezoelectric heating film with the thickness of 0.05-2 mm and the width of 30-200 mm is prepared.
B. Selecting and designing materials, wherein the heat-resistant finish coat is formed by hot pressing decorative paper impregnated with environment-friendly modified melamine resin, and the mass ratio of urea-formaldehyde resin to amine-formaldehyde resin in the environment-friendly modified melamine resin is 1:9, the addition amount of the composite additive is 4%, the gum dipping amount of the decorative paper is 150%, the volatile matter is 6%, the estimated degree is 50%, and the formaldehyde release amount is 0.1mg/L; the bottom plate and the face plate are homogeneous plywood with the thickness of 9mm and made of isocyanate adhesive, and the formaldehyde release amount is 0.016mg/m 3 The conductor is a copper bar with the thickness of 0.5mm and the width of 10mm, the thickness of the piezoelectric heat film is 0.15mm, and the width is 100mm; the piezoelectric heating film and the conductor are longitudinally or transversely laid in the middle of the bottom plate and the panel.
C. High-temperature-resistant heat-insulating paint shape with thickness of 0.2mm for coating bottom plateForming a heat insulation layer, and then coating insulating waterproof glue on the heat insulation layer, wherein the main components of the glue are styrene-acrylic modified polyvinyl acetate double-component glue and isocyanate, the mass ratio of the styrene-acrylic modified polyvinyl acetate double-component glue to the isocyanate is 100:5, and the glue application amount is 160g/m 2 。
D. The method comprises the steps of paving a low-voltage electrothermal film on a gluing surface of a bottom plate, paving conductors on two sides of the low-voltage electrothermal film, wherein the width of the contact surface of the low-voltage electrothermal film and the conductors is 5mm, fixing the conductors and the low-voltage electrothermal film on a plate surface through a U-shaped nail, wherein one low-voltage electrothermal film is a group of every two conductors, the interval between the groups is 500mm, any one of the two conductors is an anode, and the other conductor is a cathode.
E. And C, coating insulating waterproof glue on the panel, wherein the glue and the glue applying amount are consistent with those in the step C.
F. And (3) assembling, namely cold pressing and compounding, covering the gluing surface of the panel on the low-voltage electrothermal film and the conductor, assembling and compounding, and shaping by a cold press to obtain the 18-centimeter low-voltage electrothermal plywood, wherein the cold pressing pressure is 18MPa and the time is 6 hours.
And G, paving decorative paper, hot-pressing and forming, namely paving the decorative paper on the surface of the low-voltage electrothermal plywood, pressing and trimming by a hot press, and marking the positions of the low-voltage electrothermal film and the conductors on the board surface by using non-adhesive or colored adhesive tapes to obtain the 18-centimeter low-voltage electrothermal veneer plywood with the pressure of 10MPa and the temperature of 130 ℃ for 300s.
The 18 centi-low voltage electric heating facing plywood manufactured by the embodiment comprises a panel 7, a bottom plate 2, a heat insulation layer 3 and a low-voltage electric heating film 6, wherein a conductor 5 is paved on the low-voltage electric heating film 6, an insulating waterproof glue layer 4 is coated on the outer surfaces of the low-voltage electric heating film 6 and the conductor 5, the low-voltage electric heating film 6 and the conductor 5 are arranged between the panel 7 and the bottom plate 2, the heat insulation layer 3 is arranged between the low-voltage electric heating film 6 and the bottom plate 2, and a heat-resistant facing layer 1 is arranged on the outer surfaces of the panel 7 and the bottom plate 2.
Example 3
The manufacturing method of the 18 cm low-voltage electric heating facing fiber board comprises the following steps:
A. preparation of a piezoelectric thermal film:
A1. 50g of nanocellulose with the length of 3 mu m and the diameter of 10nm and 1000g of water are poured into a high-speed dispersing machine to be stirred and dispersed at a high speed of 1600r/min for 30min, so as to obtain nanocellulose suspension;
A2. adding 3.55g of nano cellulose suspension with diameter of 50nm, length of 8 μm, conductivity of 260s/cm and bulk density of 2.2g/cm into the nano cellulose suspension under stirring 3 3.55g of carbon nano tube with the thickness of 4nm, the median grain diameter of 3 mu m, the number of layers of 6 layers of graphene and 3.55g of nano copper powder with the grain diameter of 200nm are stirred at a high speed for 20min to be uniformly dispersed, so as to obtain a mixed solution A;
A3. carrying out ultrasonic treatment on the mixed solution A to obtain mixed solution B, wherein the power of ultrasonic treatment is 700W, and the time is 15min;
A4. carrying out vacuum suction filtration on the mixed solution B to obtain a nano carbon material piezoelectric heating film on the filter film, wherein the vacuum suction filtration treatment pressure is 0.08MPa, and the time is 6h;
A5. soaking the nano carbon material piezoelectric and heating film on the filter membrane in absolute ethyl alcohol for 5min, and then separating the nano carbon material piezoelectric and heating film from the filter membrane by using a mechanical stripping mode;
A6. the prepared nano carbon material low-voltage electrothermal film is subjected to dipping and drying treatment by adopting a nitrogen-phosphorus composite flame retardant solution, wherein the mass ratio of the flame retardant in the flame retardant solution is 20%, the dipping treatment time is 30S, the drying treatment temperature is 75 ℃, and the drying treatment time is 2h; the piezoelectric heating film with the thickness of 0.05-2 mm and the width of 30-200 mm is prepared.
B. Selecting and designing materials, wherein the heat-resistant finish coat is formed by hot pressing decorative paper impregnated with environment-friendly modified melamine resin, and the mass ratio of urea-formaldehyde resin to amine-formaldehyde resin in the environment-friendly modified melamine resin is 1:9, the addition amount of the composite additive is 4%, the gum dipping amount of the decorative paper is 150%, the volatile matter is 6%, the estimated degree is 50%, and the formaldehyde release amount is 0.1mg/L; the bottom plate and the face plate are moisture-proof homogeneous fiber board with thickness of 9mm and made of isocyanate adhesive, and the formaldehyde release amount is 0.016mg/m 3 The conductor is a copper bar with the thickness of 0.3mm and the width of 15mm, the thickness of the piezoelectric heat film is 0.15mm, and the width is 100mm; the piezoelectric heating film and the conductor are longitudinally or transversely laid in the middle of the bottom plate and the panel.
C. Laying a high-temperature-resistant heat-insulating film with the thickness of 0.2mm on the bottom plate to form a heat-insulating layer, and then coating insulating waterproof glue on the heat-insulating layer, wherein the main component of the glue is styrene-acrylicThe mass ratio of the modified polyvinyl acetate two-component adhesive to the isocyanate is 100:5, and the sizing amount is 160g/m 2 。
D. The method comprises the steps of paving a low-voltage electrothermal film on a gluing surface of a bottom plate, paving conductors on two sides of the low-voltage electrothermal film, wherein the width of the contact surface of the low-voltage electrothermal film and the conductors is 5mm, fixing the conductors and the low-voltage electrothermal film on a plate surface through a U-shaped nail, wherein one low-voltage electrothermal film is a group of every two conductors, the interval between the groups is 500mm, any one of the two conductors is an anode, and the other conductor is a cathode.
E. And C, coating insulating waterproof glue on the panel, wherein the glue and the glue applying amount are consistent with those in the step C.
F. And (3) cold-pressing and compounding the assembly, covering the gluing surface of the panel on the low-voltage electrothermal film and the conductor, and shaping by a cold press to obtain the 18-centimeter low-voltage electrothermal fiber board, wherein the cold-pressing pressure is 15MPa and the time is 4 hours.
And G, paving decorative paper on the surface of the low-voltage electrothermal fiber board, pressing and trimming by a hot press, and marking the positions of the low-voltage electrothermal film and the conductor on the board surface by using non-adhesive glue or colored adhesive tape to obtain the 18-centimeter low-voltage electrothermal facing fiber board, wherein the pressure is 15MPa, the temperature is 205 ℃, and the time is 20s.
The 18 centi-low voltage electric heating facing fiber board manufactured by the embodiment comprises a panel 7, a bottom plate 2, a heat insulation layer 3 and a low voltage electric heating film 6, wherein a conductor 5 is paved on the low voltage electric heating film 6, an insulating waterproof glue layer 4 is coated on the outer surfaces of the low voltage electric heating film 6 and the conductor 5, the low voltage electric heating film 6 and the conductor 5 are arranged between the panel 7 and the bottom plate 2, the heat insulation layer 3 is arranged between the low voltage electric heating film 6 and the bottom plate 2, and a heat-resistant facing layer 1 is arranged on the outer surfaces of the panel 7 and the bottom plate 2.
Table 1 comparison of examples with results of inspection of ordinary veneer artificial boards
As can be seen from Table 1, the appearance quality and physical and chemical properties of the low-voltage electric heating veneer manufactured by the application are basically consistent with those of common veneer artificial boards, the formaldehyde release amount is lower and more environment-friendly, the influence on the appearance and properties of the veneer artificial boards after embedding conductors and the low-voltage electric heating films is smaller, the veneer artificial boards have the function of electrifying and heating, the veneer artificial boards can safely and stably pass through current of less than 36V and current of 6A, when the current is 12-36V, the heating temperature of 0.5-1.5 h reaches 40 ℃, the temperature difference of each test point is not more than 1 ℃, the temperature rise is fast, the heating is uniform, the electric heating stability is good, the application range of the veneer artificial boards is enlarged, a platform can be provided for the application of intelligent home, a wiring system is simplified, and the development of the intelligent home is promoted.
Variations and modifications to the above would be obvious to persons skilled in the art to which the application pertains from the foregoing description and teachings. Therefore, the application is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the application should be also included in the scope of the claims of the application. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present application in any way.
Claims (9)
1. The low-voltage electric heating veneer is characterized by comprising a panel, a bottom plate, a heat insulation layer and a low-voltage electric heating film, wherein a conductor is paved on the low-voltage electric heating film, an insulating waterproof glue layer is coated on the outer surfaces of the low-voltage electric heating film and the conductor, the low-voltage electric heating film and the conductor are arranged between the panel and the bottom plate, the heat insulation layer is arranged between the low-voltage electric heating film and the bottom plate, a heat-resistant finish layer is arranged on the outer surfaces of the panel and the bottom plate, the heat-resistant finish layer is provided with a position mark of the low-voltage electric heating film and the conductor, and the panel, the bottom plate, the heat insulation layer and the low-voltage electric heating film are glued through a high-temperature-resistant adhesive to form an integral structure;
the low-voltage electrothermal film comprises 40-70 parts by weight of nanocellulose, 5-25 parts by weight of carbon nanotubes, 5-25 parts by weight of graphene and 5-20 parts by weight of conductive nano metal;
the preparation method of the low-voltage electric heating veneer comprises the following steps:
(1) Pouring the nanocellulose into water and mixing to prepare nanocellulose suspension;
(2) Pouring carbon nanotubes, graphene and conductive nano metals into the nanocellulose suspension for mixing;
(3) Flattening and drying the mixed solution prepared in the step (2) to obtain the piezoelectric heating film;
(4) Selecting materials and designing, selecting proper materials according to actual use requirements, designing, determining specification and size of a conductor and the low-voltage electrothermal film, paving positions, directions, quantity, intervals and the like;
(5) Coating high-temperature resistant heat-insulating paint on the bottom plate or paving a heat-insulating film to form a heat-insulating layer, and then coating insulating waterproof glue on the heat-insulating layer, wherein the glue application amount is 150-200 g/m 2 ；
(6) The low-voltage electrothermal film and the conductor are paved and fixed on the bottom plate, and the low-voltage electrothermal film and the conductor are fixed on the gluing surface of the bottom plate by using a U-shaped nail;
(7) The panel is coated with insulating waterproof glue, and the glue application amount is 150-200 g/m 2 ；
(8) Assembling, cold pressing and compounding, wherein the gluing surface of the panel covers the low-voltage electrothermal film and the conductor, assembling and compounding, shaping in a cold press, and cold pressing technological parameters: the pressure is 13-20 MPa, and the time is 2-8 h;
(9) Forming a heat-resistant finish coat on the outer surfaces of the bottom plate and the panel through hot pressing, coating or compounding, forming the heat-resistant finish coat by hot pressing decorative paper impregnated with amino resin, paving the decorative paper on the surface of the composite board prepared in the step (8), pressing and trimming by a hot press, and hot pressing the decorative paper with hot pressing technological parameters: the pressure is 8-20 MPa, the temperature is 120-210 ℃ and the time is 16-350 s, and after the pressing is finished, the positions of the low-voltage electrothermal film and the conductor are marked by using non-adhesive glue or colored adhesive tape on the surface of the board, thus obtaining the low-voltage electrothermal veneer.
2. A low voltage electrothermal veneer according to claim 1, wherein the low voltage electrothermal film comprises a flame retardant that is a phosphorus based flame retardant and/or a nitrogen-phosphorus composite flame retardant.
3. A low voltage electrothermal panel according to claim 1, wherein the contact surface width of the low voltage electrothermal film and the conductor is not less than 5mm.
4. A panel according to claim 1, wherein the nanocellulose has a length of 0.5 μm to 5 μm and a diameter of 0.5nm to 20nm; the diameter of the carbon nano tube is 5 nm-80 nm, the length is 1 mu m-15 mu m, the conductivity is above 160s/cm, and the bulk density is 2.0g/cm 3 ～2.3g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the graphene is 0.5-8 nm, the median particle diameter is 0.5-6 mu m, and the number of layers is 4-8; the particle size of the conductive nano metal is 50-300 nm.
5. A low-voltage electric heating veneer according to claim 1, characterized in that the heat-resistant veneer layer can be formed by hot pressing, coating or compounding, and is formed by hot pressing a decorative paper impregnated with an environment-friendly modified melamine resin, wherein the mass ratio of urea resin to melamine-formaldehyde resin in the environment-friendly modified melamine resin is 1:9, the decorative paper contains 3-4% of composite additive, wherein the composite additive is formed by mixing aqueous polyurethane, methacrylic acid and silicate, and the formaldehyde release amount of the decorative paper is less than or equal to 0.3mg/L.
6. The low-voltage electric heating veneer according to claim 1, wherein the heat insulation layer is made of high-temperature resistant heat insulation material, the high-temperature resistant heat insulation material is organic high-temperature resistant heat insulation paint or heat insulation film, the heat insulation layer is combined with the bottom plate in a coating or gluing mode, the thickness of the heat insulation layer is not more than 0.5mm, and the main components of the insulating waterproof glue layer are styrene-acrylic modified polyvinyl acetate bicomponent glue and isocyanate, and the mass ratio of the styrene-acrylic modified polyvinyl acetate bicomponent glue to the isocyanate is 100:5-10.
7. A low-voltage electric heating veneer according to claim 1, wherein the base plate and the panel are any one or combination of a chipboard, a medium density fiberboard, an oriented chipboard and a plywood, and are of a homogeneous structure and made of an isocyanate-based adhesive, formaldehyde is releasedThe discharge amount is less than or equal to 0.03mg/m 3 。
8. A low-voltage electrothermal veneer according to claim 1, wherein in step (1), the amount of nanocellulose added is 0.2-5% of the water mass.
9. A low-voltage electrothermal veneer according to claim 1, wherein the low-voltage electrothermal film produced in step (3) is subjected to a dip-drying treatment with a flame retardant solution.
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| CN206807799U (en) * | 2016-12-02 | 2017-12-26 | 肖议 | A kind of electric heat-emitting board based on graphene technology |
| CN110191523A (en) * | 2019-04-17 | 2019-08-30 | 中国林业科学研究院木材工业研究所 | A kind of low-voltage high-efficiency nano-carbon material Electric radiant Heating Film preparation method and application |
| CN110076858A (en) * | 2019-04-30 | 2019-08-02 | 连云港市工业投资集团有限公司 | Wooden floor based on carbon paper as heating layer and preparation method thereof |
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