CN114143920A - Low-voltage electric heating veneer and preparation method thereof - Google Patents

Low-voltage electric heating veneer and preparation method thereof Download PDF

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Publication number
CN114143920A
CN114143920A CN202111227952.3A CN202111227952A CN114143920A CN 114143920 A CN114143920 A CN 114143920A CN 202111227952 A CN202111227952 A CN 202111227952A CN 114143920 A CN114143920 A CN 114143920A
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low
electric heating
heat
voltage electric
voltage
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CN114143920B (en
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曾敏华
谭炎新
胡硕飞
吴惠娟
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Guangdong Yaodonghua Decoration Materials Technology Co ltd
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Guangdong Yaodonghua Decoration Materials Technology Co ltd
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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—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heater 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—Heater 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

Abstract

The invention discloses a low-voltage electrothermal decorative panel and a preparation method thereof, and the low-voltage electrothermal decorative panel comprises a panel, a bottom plate, a heat-insulating layer, a low-voltage electrothermal film and a conductor, wherein the outer surfaces of the low-voltage electrothermal film and the conductor are coated with an insulating waterproof adhesive layer, so that the product is safer and more reliable, the outer surfaces of the panel and the bottom plate are provided with the heat-resistant decorative layers, the low-voltage electrothermal film is prepared by mixing nano-cellulose, carbon nano-tubes, graphene and conductive nano-metals and is prepared by the steps of high-speed stirring dispersion, ultrasonic treatment, vacuum filtration treatment, impregnation drying treatment and the like, the product is quick in heating and temperature rise, uniform in heating, energy-storage and energy-saving, good in electrothermal stability, does not damage the internal structure of the panel, does not need external wiring, can be used after being electrified, can safely and stably pass a current below 36V and 6A for 0.5-1.5 h when being electrified to 36V, the heating temperature reaches 40 ℃, 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 the product has the functions of electric conduction, heating and far infrared health care.

Description

Low-voltage electric heating veneer and preparation method thereof
Technical Field
The invention 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 household market on functionalization, intellectualization, individuation and environmental protection, endowing the artificial board and the facing artificial board with sound, light, electricity, magnetism, heat and other functions has been a research hotspot and concern of the industry all the time.
The wood composite material has the advantages of 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, good in latent heat performance and has a far infrared health care function, so that the wood composite material has wide industrialization and market prospect as a novel material and a product in the 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 are added into conductive slurry to improve the conductivity so as to reduce the resistance, so that the heating efficiency is improved, but the carbon nanotubes and graphene added into the conductive film need to pass through an additional chemical treatment process, so that the preparation cost is relatively high, and more environmental pollution problems are caused;
secondly, in the prior art, the connecting materials commonly used by the conductive film clamped by the heating plate are non-degradable acrylic resin, polyurethane resin and the like, so that the environmental protection performance is poor;
thirdly, the heating plate made of carbon fiber heating paper, a carbon crystal low-voltage electric heating film and a carbon fiber cable is mainly electrified and heated by 220V voltage, potential leakage safety risk exists, popularization and use are influenced, and the heating plate made of carbon fiber is linear heating, so that local overhigh temperature and large heating area temperature difference are easily caused;
fourthly when current low pressure decorative board that generates heat uses need wiring in addition, and the intensification is slower, and it is inhomogeneous to generate heat, and electric heat stability is relatively poor, and insulating waterproof nature is general, and the resistivity is high, and power density is little, is unfavorable for low-voltage work, uses for a long time and destroys panel inner structure easily, has the potential safety hazard.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a low-voltage electric heating veneer and a preparation method thereof, aiming at overcoming the technical problems 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, having simple and reasonable process, effectively improving the construction efficiency and reducing the cost.
The technical scheme of the invention is realized as follows:
the utility model provides a low pressure electric heat decorative board, is including panel, bottom plate, insulating layer and low pressure electric heat membrane, the conductor has been laid to the low pressure electric heat membrane, the surface coating of low pressure electric heat membrane and conductor has insulating waterproof glue layer, improves insulating waterproof performance, low pressure electric heat membrane and conductor set up in between panel and the bottom plate, the insulating layer sets up between low pressure electric heat membrane and bottom plate, realizes one-way generating heat, makes the product safer and more reliable, and life is longer, the surface of panel and bottom plate is provided with heat-resisting finish coat, heat-resisting finish coat is equipped with the position sign of low pressure electric heat membrane and conductor, panel, bottom plate, insulating layer and low pressure electric heat membrane form overall structure through high temperature resistant adhesive veneer.
The low-voltage electric heating film is prepared by mixing 40-70 parts by weight of nano-cellulose, 5-25 parts by weight of carbon nano-tubes, 5-25 parts by weight of graphene and 5-20 parts by weight of conductive nano-metals.
The graphene has excellent electric conduction and heat conduction performance, the electric heating mode in the prior art is to prepare the graphene into slurry, the slurry generally contains nondegradable components, and the slurry is coated on a substrate with higher hardness to prepare a planar heating low-voltage electric heating film. The low-voltage electrothermal film has the following defects: firstly, graphene must be loaded on a substrate with higher hardness to keep the resistance relatively stable, so that the low-voltage electrothermal film has higher hardness and thicker thickness and is easy to break when being impacted by external force, and the production and transportation of the plate are very unfavorable; secondly, the laminated structure of the graphene enables the specific surface area of the graphene to be extremely large, and the graphene 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 low.
Firstly, in order to abandon the components of the non-degradable slurry and solve the problems of high hardness and easy breakage, the invention adopts the nano-cellulose and the carbon nano-tube to form a bendable winding system, the graphene is stably and uniformly clamped in the system, the resistance can still keep relatively stable without substrate bearing, and the graphene is naturally made into the slurry without the substrate bearing, thereby realizing the environmental protection purpose of the invention; and secondly, adding conductive nano metal which can be mixed between layers of the graphene, so that the longitudinal heat conduction rate of the layers of the graphene is effectively enhanced.
The carbon nano tube also has relatively excellent electric conduction and heat conduction performance, has very large length-diameter ratio, can be self-assembled into a network-shaped film, has excellent flexibility and mechanical strength, and can be bent freely and keep stable electric performance. The reason why the present invention does not use a carbon nanotube alone 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 invention utilizes the characteristic of self-winding of the carbon nano tube to clamp the graphene, so that the invention is not only difficult to fracture (realized by the carbon nano tube) but also has higher strength and stiffness (realized by the graphene).
Due to the fact that the graphene is not clamped very firmly by the self-assembly characteristic of the carbon nano tube, degradable nano cellulose is introduced to the graphene, the degradable nano cellulose is enhanced in a disperse phase mode, the nano cellulose can slide along the gaps and the surfaces of the carbon nano tube and the graphene and can be connected with each other in a key-connection mode, and the stability and the tightness of the whole connection are guaranteed.
In conclusion, the low-voltage electric heating veneer has excellent electric conduction and heat conduction performance, overcomes the defects that the preparation process of the graphene heating film is not environment-friendly and needs a substrate, and has the advantages of difficult fracture, high strength and high stiffness; compared with the linear heating carbon fiber, the low-voltage electric heating film disclosed by the invention generates heat in a surface mode, cannot cause overhigh local temperature, and is safer and more stable.
Preferably, the low-voltage electrothermal film also 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, the phosphorus flame retardant and/or the nitrogen-phosphorus composite flame retardant have good stability to light, the generated toxic gas and corrosive gas are less than those of a halogen flame retardant, the phosphorus flame retardant can be used for flame retardance and plasticization, 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 nanocellulose has a length of 0.5 to 5 μm and a diameter of 0.5 to 20 nm.
Preferably, the carbon nano tube has the diameter of 5nm to 80nm, the length of 1 mu m to 15 mu m, the conductivity of more than 160s/cm and the bulk density of 2.0g/cm3～2.3g/cm3。
Preferably, the graphene has a thickness of 0.5nm to 8nm, a median particle diameter of 0.5 μm to 6 μm, and 4 to 8 layers.
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 facing 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-formaldehyde resin to melamine-formaldehyde resin in the environment-friendly modified melamine resin is 1: and 9, the composite additive contains 3-4% of composite additive, is formed by mixing waterborne polyurethane, methacrylic acid and silicate, can effectively improve the functionality of the resin, improve the crosslinking density of a cured resin, improve the heat resistance of the resin, and can not cause quality problems when the resin is heated after being 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%, and the formaldehyde release amount is less than or equal to 0.3mg/L, so that the pressing applicability, the product quality and the environmental protection performance are ensured.
Preferably, the heat insulation layer is a high-temperature-resistant heat insulation material which is an organic high-temperature-resistant heat insulation coating or a heat insulation film and 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 achieved, the product is safer and more reliable, and the application range is wider.
Preferably, the main components of the insulating waterproof glue layer are styrene-acrylic modified polyvinyl acetate bicomponent glue and isocyanate, the mass ratio of the styrene-acrylic modified polyvinyl acetate bicomponent glue to the isocyanate is 100: 5-10, and the insulating waterproof glue layer can insulate and prevent water and can ensure the bonding strength between the low-voltage electric heating film and the panel and the bottom plate.
Preferably, the bottom plate and the face plate are any one or combination of artificial plates such as shaving boards, medium-density fiber boards, oriented strand boards and plywood, the artificial plates are of homogeneous structures, are made of isocyanate adhesives, are stable in structure, waterproof and heat-resistant, cannot damage the internal structures even being heated, are 1-25 mm in thickness and have a formaldehyde release amount of less than or equal to 0.03mg/m3。
Preferably, the width of the contact surface of the low-voltage electrothermal film and the conductor is not less than 5 mm.
Preferably, the conductor is made of any one of metals such as copper, iron and aluminum, the thickness of the conductor is 0.1-1 mm, the width of the conductor is 5-20 mm, and the conductivity and the connection convenience of the conductor are guaranteed.
Preferably, the thickness of the low-voltage electrothermal film is 0.05-2 mm, and the width of the low-voltage electrothermal film is 30-200 mm.
The preparation method of the low-voltage electric heating veneer comprises the following steps:
(1) pouring the nano-cellulose into water, mixing to prepare nano-cellulose suspension, and ensuring that the nano-cellulose suspension can fully intertwine the carbon nano-tube, the graphene and the conductive nano-metal;
(2) pouring carbon nanotubes, graphene and conductive nano metal into the nano cellulose suspension for mixing;
(3) and (3) flattening and drying the mixed solution prepared in the step (2) to obtain the low-voltage heat-conducting conductive film.
Preferably, in the step (1), the adding amount of the nano-cellulose accounts for 0.2-5% of the mass of water, and the nano-cellulose is stirred and mixed at a high speed by a high-speed dispersion machine, wherein the rotating speed is 1500-2500 r/min, and the time is 15-40 min. If the addition amount of the nano-cellulose exceeds 5%, the viscosity is too high, and if the addition amount of the nano-cellulose is less than 0.2%, the density of the nano-cellulose in the dispersed water is too low, so that the two conditions are not favorable for the nano-cellulose to be intertwined and stabilize the carbon nano-tube, the graphene and the conductive nano-metal.
(4) Selecting materials and designing, selecting proper materials according to actual use requirements and designing, and determining the specification and size, laying position, direction, quantity, spacing and the like of the low-voltage electrothermal film and the conductor;
(5) coating a high-temperature-resistant heat-insulating coating 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/m2；
(6) The low-voltage electric heating film and the conductor are laid and fixed on the bottom plate, the low-voltage electric heating film and the conductor are fixed on the gluing surface of the bottom plate through a U-shaped nail, specifically, the low-voltage electric heating film is laid firstly, then the conductor is laid on two sides of the low-voltage electric heating film, the width of the contact surface of the low-voltage electric heating film and the conductor is not less than 5mm, the conductor and the low-voltage electric heating film are fixed on the plate surface through the U-shaped nail, one low-voltage electric heating film is arranged in one group for every two conductors, the interval between the groups is 200-1000 mm, any one of the two conductors is a positive electrode, the other one is a negative electrode, and the conductive connection mode is simplified;
(7) the panel is coated with insulating waterproof glue, and the glue application amount is 150-200 g/m2；
(8) Assembling and cold pressing for compounding, wherein the gluing surface of the panel covers the low-voltage electric heating film and the conductor for assembling and compounding, and the low-voltage electric heating film and the conductor are shaped by a cold press, and the cold pressing technological parameters are as follows: the pressure is 13-20 MPa, the time is 2-8 h, and the glue is completely cured and is not layered;
(9) forming heat-resistant decorative finish layers on the outer surfaces of the bottom plate and the panel in a hot pressing, coating or compounding mode and the like, preferentially adopting decorative paper impregnated with amino resin for hot pressing, paving the decorative paper on the surface of the composite plate prepared in the step (8), entering a hot press for pressing and trimming, wherein the hot pressing technological parameters are as follows: and marking the positions of the low-voltage electric heating film and the conductor on the board surface by using non-stick glue or colored adhesive tapes after the pressing and pasting is finished under the pressure of 8-20 MPa, the temperature of 120-210 ℃ and the time of 16-350 s, so as to obtain the low-voltage electric heating veneer. In the actual production, the decorative effect of the product can be ensured by properly adjusting the pressing and pasting effect.
Preferably, in the step (2), the carbon nanotubes, the graphene and the conductive nano metal are added under the condition of keeping stirring in the step (1), the rotating speed is 1500-2500 r/min, and the time 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 and the time of 5-20 min, so that bubbles are eliminated, and all components are uniformly distributed.
Preferably, in the step (3), the mixed solution prepared in the step (2) is subjected to vacuum filtration treatment under the pressure of 0.05-0.2 MPa for 3-8 hours to prepare a low-voltage electrothermal film on the filter membrane, the low-voltage electrothermal film is soaked in absolute ethyl alcohol for 3-8 min, 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 dipping and 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 invention has the beneficial effects that:
(1) the low-voltage electrothermal film is prepared by combining carbon nanotubes, graphene, nanocellulose, nano-copper powder and water with specific specifications according to a specific proportion and performing high-speed stirring dispersion, ultrasonic treatment, vacuum filtration treatment, dipping drying treatment and other steps, and the product is quick in heating and warming, uniform in heating, energy-saving and energy-saving, good in electrothermal stability and free of damage to the internal structure of the board;
(2) the low-voltage electric heating film is subjected to flame-retardant dipping treatment and is covered by the insulating waterproof adhesive layer, the used adhesive is a high-temperature-resistant adhesive and is provided with the heat-insulating layer, so that the low-voltage electric heating film can generate heat in a single direction, the effect of stable heating of the low-voltage electric heating veneer is realized, and the low-voltage electric heating film is safe and reliable;
(3) the low-voltage electric heating veneer of the invention has no organic solvent, and the decorative paper, the glue and the artificial board are all materials with high environmental protection grade, thus being environment-friendly and healthy;
(4) the low-voltage electric heating veneer disclosed by the invention is used immediately after being connected with electricity without external wiring, realizes wireless heating and temperature rise, simplifies a wiring system, can generate heat and provide a power supply platform for application of smart homes, is convenient and quick to construct and maintain, improves the construction efficiency, reduces the cost, and effectively promotes the development of smart homes;
(5) the low-voltage electric heating veneer can safely and stably pass the current of 6A below 36V for 0.5-1.5 h when the low-voltage electric heating veneer is electrified for 12-36V, the heating temperature reaches 40 ℃, and the temperature difference of each test point does not exceed 1 ℃;
(6) the invention has simple and reasonable production process and low cost, and the prepared product has good decorative effect, the performance of the product meets the national standard requirement, and simultaneously has the functions of electric conduction, heating and far infrared health care.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that 18 cm is a term of art, i.e., 18 mm, and that the indicated orientations or positional relationships, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., are based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Example 1
The manufacturing method of the 18 cm low-voltage electric heating veneer particle board comprises the following steps:
A. preparing a low-voltage electrothermal film:
A1. pouring 2g of nano-cellulose with the length of 3 mu m and the diameter of 10nm and 1000g of water into a high-speed dispersion machine, and stirring and dispersing at a high speed of 1600r/min for 30min to obtain nano-cellulose suspension;
A2. under the condition of stirring, 1.25g of nano-cellulose suspension with the diameter of 50nm, the length of 8 μm, the conductivity of 260s/cm and the bulk density of 2.2g/cm is continuously added31.25g of the carbon nano tube with the thickness of 4nm, the median particle size of 3 mu m and 6 layers of graphene and 1g of nano copper powder with the particle size of 200nm are stirred at a high speed for 20min to be uniformly dispersed to obtain a mixed solution A;
A3. carrying out ultrasonic treatment on the mixed solution A to obtain a mixed solution B, wherein the ultrasonic treatment power is 700W, and the ultrasonic treatment time is 15 min;
A4. carrying out vacuum filtration treatment on the mixed solution B to prepare the nano-carbon material low-voltage electrothermal film on the filter membrane, wherein the vacuum filtration treatment pressure is 0.08MPa, and the time is 6 hours;
A5. soaking the nano-carbon material low-voltage electrothermal film on the filter membrane in absolute ethyl alcohol for 5min, and then separating the nano-carbon material low-voltage electrothermal film from the filter membrane in a mechanical stripping mode;
A6. carrying out dipping and drying treatment on the prepared nano-carbon material low-voltage electrothermal film by adopting a nitrogen-phosphorus composite flame retardant solution, wherein the mass of a flame retardant in the flame retardant solution accounts for 25%, the dipping treatment time is 30S, the drying treatment temperature is 75 ℃, and the drying treatment time is 2 h; the low-voltage electrothermal film with the thickness of 0.05-2 mm and the width of 30-200 mm is prepared.
B. Selecting materials and designing, wherein the heat-resistant facing layer is formed by hot-pressing decorative paper impregnated with environment-friendly modified melamine resin, and the mass ratio of urea-formaldehyde resin to amine-aldehyde resin in the environment-friendly modified melamine resin is 1: 9, the adding amount of the composite additive is 3 percent, the gum dipping amount of the decorative paper is 150 percent, the volatile matter is 6 percent, the pre-estimated degree is 50 percent, and the formaldehyde emission is 0.1 mg/L; the bottom plate and the face plate are 9mm thick moisture-proof homogeneous shaving boards made of isocyanate adhesive and have formaldehyde emission of 0.014mg/m3The conductor is a copper bar with the thickness of 0.3mm and the width of 15mm, the thickness of the low-voltage electric heating film is 0.15mm, and the width of the low-voltage electric heating film is 100 mm; the low-voltage electric heating film and the conductor are longitudinally or transversely paved between the bottom plate and the panel.
C. Coating a high-temperature-resistant heat-insulating coating with the thickness of 0.3mm on the bottom plate to form a heat-insulating layer, coating insulating waterproof glue on the heat-insulating layer, wherein the glue mainly comprises styrene-acrylic modified polyvinyl acetate bicomponent glue and isocyanate, the mass ratio of the styrene-acrylic modified polyvinyl acetate bicomponent glue to the isocyanate is 100:5, and the glue application amount is 160g/m2。
D. Laying a low-voltage electric heating film on the glue coating surface of the bottom plate, laying conductors on two sides of the low-voltage electric heating film, wherein the width of the contact surface of the low-voltage electric heating film and the conductors is 6mm, fixing the conductors and the low-voltage electric heating film on the plate surface through U-shaped nails, wherein each two conductors are one low-voltage electric heating film group, the interval between the groups is 600mm, and any one of the two conductors is a positive electrode while the other is a negative electrode;
E. and D, coating insulating waterproof glue on the panel, wherein the glue and the glue application amount are consistent with those in the step C.
F. And (3) assembling and cold pressing, compounding, namely covering the gluing surface of the panel on the low-voltage electric heating film and the conductor, assembling and compounding, and shaping in a cold press to obtain the 18 cm low-voltage electric heating shaving board, wherein the cold pressing pressure is 15MPa, and the time is 4 hours.
G, laying decorative paper for hot press molding, laying the decorative paper on the surface of the low-voltage electric heating shaving board, pressing and trimming the decorative paper in a hot press, and marking the positions of the low-voltage electric heating film and the conductor on the surface by using non-stick glue or colored adhesive tapes to obtain the 18 cm low-voltage electric heating decorative surface shaving board, wherein the pressure is 15MPa, the temperature is 200 ℃ and the time is 23 s.
The 18 cm low-voltage electric heating veneer chipboard 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, conductors 5 are paved on the low-voltage electric heating film 6, the outer surfaces of the low-voltage electric heating film 6 and the conductors 5 are coated with an insulating waterproof glue layer 4, the low-voltage electric heating film 6 and the conductors 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 the outer surfaces of the panel 7 and the bottom plate 2 are provided with heat-resistant finish coat layers 1.
Example 2
The manufacturing method of the 18 cm low-voltage electric heating veneer comprises the following steps:
A. preparing a low-voltage electrothermal film:
A1. pouring 26g of nano-cellulose with the length of 3 mu m and the diameter of 10nm and 1000g of water into a high-speed dispersion machine, and stirring and dispersing at a high speed of 1600r/min for 30min to obtain nano-cellulose suspension;
A2. under the condition of stirring, 7.05g 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 is continuously added37.05g of the carbon nano tube with the thickness of 4nm, the median particle size of 3 mu m and 6 layers of graphene and 6.25g of nano copper powder with the particle size of 200nm are stirred at a high speed for 20min to be uniformly dispersed to obtain a mixed solution A;
A3. carrying out ultrasonic treatment on the mixed solution A to obtain a mixed solution B, wherein the ultrasonic treatment power is 700W, and the ultrasonic treatment time is 15 min;
A4. carrying out vacuum filtration treatment on the mixed solution B to prepare the nano-carbon material low-voltage electrothermal film on the filter membrane, wherein the vacuum filtration treatment pressure is 0.08MPa, and the time is 6 hours;
A5. soaking the nano-carbon material low-voltage electrothermal film on the filter membrane in absolute ethyl alcohol for 5min, and then separating the nano-carbon material low-voltage electrothermal film from the filter membrane in a mechanical stripping mode;
A6. carrying out dipping and drying treatment on the prepared nano-carbon material low-voltage electrothermal film by adopting a nitrogen-phosphorus composite flame retardant solution, wherein the mass percentage 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 2 h; the low-voltage electrothermal film with the thickness of 0.05-2 mm and the width of 30-200 mm is prepared.
B. Selecting materials and designing, wherein the heat-resistant facing layer is formed by hot-pressing decorative paper impregnated with environment-friendly modified melamine resin, and the mass ratio of urea-formaldehyde resin to amine-aldehyde resin in the environment-friendly modified melamine resin is 1: 9, the adding amount of the composite additive is 4%, the gum dipping amount of the decorative paper is 150%, the volatile matter is 6%, the pre-estimated degree is 50%, and the formaldehyde emission is 0.1 mg/L; the bottom plate and the face plate are homogeneous plywood made of isocyanate adhesive with the thickness of 9mm and the formaldehyde emission is 0.016mg/m3The conductor is a copper bar with the thickness of 0.5mm and the width of 10mm, the thickness of the low-voltage electric heating film is 0.15mm, and the width of the low-voltage electric heating film is 100 mm; the low-voltage electric heating film and the conductor are longitudinally or transversely paved between the bottom plate and the panel.
C. Coating a high-temperature-resistant heat-insulating coating with the thickness of 0.2mm on the bottom plate to form a heat-insulating layer, coating insulating waterproof glue on the heat-insulating layer, wherein the glue mainly comprises styrene-acrylic modified polyvinyl acetate bicomponent glue and isocyanate, the mass ratio of the styrene-acrylic modified polyvinyl acetate bicomponent glue to the isocyanate is 100:5, and the glue application amount is 160g/m2。
D. Lay the low pressure electric heat membrane on the bottom plate rubber coating face, then lay the conductor on low pressure electric heat membrane both sides, both contact surface widths are 5mm, fix conductor and low pressure electric heat membrane on the face through the U type nail, and per two conductors a low pressure electric heat membrane is a set of, and the interblock interval is 500mm, and two arbitrary one of conductor is anodal, and another is the negative pole.
E. And D, coating insulating waterproof glue on the panel, wherein the glue and the glue application amount are consistent with those in the step C.
F. And (3) assembling and cold pressing, compounding, covering the panel gluing surface on the low-voltage electric heating film and the conductor, assembling and compounding, and shaping in a cold press to obtain the 18 cm low-voltage electric heating plywood, wherein the cold pressing pressure is 18MPa, and the time is 6 hours.
Laying decorative paper, hot-pressing and forming, laying the decorative paper on the surface of the low-voltage electric heating plywood, pressing and trimming in a hot press, and marking the positions of the low-voltage electric heating film and the conductor on the surface by using non-stick glue or colored adhesive tapes to obtain the 18 cm low-voltage electric heating veneer plywood with the pressure of 10MPa, the temperature of 130 ℃ and the time of 300 s.
The 18 cm low-voltage electric heating veneer 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 laid on the low-voltage electric heating film 6, the outer surfaces of the low-voltage electric heating film 6 and the conductor 5 are coated with an insulating waterproof glue layer 4, 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 the outer surfaces of the panel 7 and the bottom plate 2 are provided with heat-resistant finish coats 1.
Example 3
The manufacturing method of the 18 cm low-voltage electrothermal facing fiberboard comprises the following steps:
A. preparing a low-voltage electrothermal film:
A1. pouring 50g of nano-cellulose with the length of 3 mu m and the diameter of 10nm and 1000g of water into a high-speed dispersion machine, and stirring and dispersing at a high speed of 1600r/min for 30min to obtain nano-cellulose suspension;
A2. under the condition of stirring, 3.55g of nano-cellulose suspension with the diameter of 50nm, the length of 8 μm, the conductivity of 260s/cm and the bulk density of 2.2g/cm is continuously added33.55g of the carbon nano tube with the thickness of 4nm, the median particle size of 3 mu m and 6 layers of graphene and 3.55g of nano copper powder with the particle size of 200nm are stirred at a high speed for 20min to be uniformly dispersed to obtain a mixed solution A;
A3. carrying out ultrasonic treatment on the mixed solution A to obtain a mixed solution B, wherein the ultrasonic treatment power is 700W, and the ultrasonic treatment time is 15 min;
A4. carrying out vacuum filtration treatment on the mixed solution B to prepare the nano-carbon material low-voltage electrothermal film on the filter membrane, wherein the vacuum filtration treatment pressure is 0.08MPa, and the time is 6 hours;
A5. soaking the nano-carbon material low-voltage electrothermal film on the filter membrane in absolute ethyl alcohol for 5min, and then separating the nano-carbon material low-voltage electrothermal film from the filter membrane in a mechanical stripping mode;
A6. carrying out dipping and drying treatment on the prepared nano-carbon material low-voltage electrothermal film by adopting a nitrogen-phosphorus composite flame retardant solution, wherein the mass percentage 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 2 h; the low-voltage electrothermal film with the thickness of 0.05-2 mm and the width of 30-200 mm is prepared.
B. Selecting materials and designing, wherein the heat-resistant facing layer is formed by hot-pressing decorative paper impregnated with environment-friendly modified melamine resin, and the mass ratio of urea-formaldehyde resin to amine-aldehyde resin in the environment-friendly modified melamine resin is 1: 9, the adding amount of the composite additive is 4%, the gum dipping amount of the decorative paper is 150%, the volatile matter is 6%, the pre-estimated degree is 50%, and the formaldehyde emission is 0.1 mg/L; the bottom plate and the face plate are moisture-proof homogeneous fiber plates with thickness of 9mm and made of isocyanate adhesive, and the formaldehyde emission is 0.016mg/m3The conductor is a copper bar with the thickness of 0.3mm and the width of 15mm, the thickness of the low-voltage electric heating film is 0.15mm, and the width of the low-voltage electric heating film is 100 mm; the low-voltage electric heating film and the conductor are longitudinally or transversely paved between the bottom plate and the panel.
C. Laying a high-temperature-resistant heat-insulating film with the thickness of 0.2mm on a bottom plate to form a heat-insulating layer, then coating insulating waterproof glue on the heat-insulating layer, wherein the glue mainly comprises styrene-acrylic modified polyvinyl acetate bicomponent glue and isocyanate, the mass ratio of the styrene-acrylic modified polyvinyl acetate bicomponent glue to the isocyanate is 100:5, and the glue application amount is 160g/m2。
D. Lay the low pressure electric heat membrane on the bottom plate rubber coating face, then lay the conductor on low pressure electric heat membrane both sides, both contact surface widths are 5mm, fix conductor and low pressure electric heat membrane on the face through the U type nail, and per two conductors a low pressure electric heat membrane is a set of, and the interblock interval is 500mm, and two arbitrary one of conductor is anodal, and another is the negative pole.
E. And D, coating insulating waterproof glue on the panel, wherein the glue and the glue application amount are consistent with those in the step C.
F. And (3) assembling and cold pressing, compounding, namely covering the gluing surface of the panel on the low-voltage electric heating film and the conductor, assembling and compounding, and shaping in a cold press to obtain the 18 cm low-voltage electric heating fiber board, wherein the cold pressing pressure is 15MPa, and the time is 4 hours.
Laying decorative paper, hot-pressing and molding, laying the decorative paper on the surface of the low-voltage electric heating fiber board, pressing and trimming in a hot press, and marking the positions of the low-voltage electric heating film and the conductor on the board surface by using non-stick glue or colored adhesive tapes to obtain the 18 cm low-voltage electric heating facing fiber board, wherein the pressure is 15MPa, the temperature is 205 ℃, and the time is 20 s.
The 18 cm low-voltage electric heating facing fiberboard 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 laid on the low-voltage electric heating film 6, the outer surfaces of the low-voltage electric heating film 6 and the conductor 5 are coated with an insulating waterproof glue layer 4, 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 the outer surfaces of the panel 7 and the bottom plate 2 are provided with heat-resistant facing layers 1.
Table 1 comparison of the test results of the examples and the ordinary facing wood-based panels
Figure BDA0003314918880000111
As can be seen from the table 1, the appearance quality and the physical and chemical properties of the low-voltage electric heating veneer manufactured by the invention are basically consistent with those of a common veneer artificial board, the low-voltage electric heating veneer meets the requirements of national standards, the formaldehyde emission is lower and more environment-friendly, the influence on the appearance and the properties of the veneer artificial board after embedding the conductor and the low-voltage electric heating film is small, but the veneer artificial board has the function of heating after being electrified, the current of 6A below 36V can be safely and stably passed, when the current is electrified to 12-36V, the heating temperature reaches 40 ℃ within 0.5-1.5 h, the temperature difference of each test point does not exceed 1 ℃, the temperature rise is fast, the heating is uniform, the electric heating stability is good, the use range of the veneer artificial board is expanded, a platform can be provided for the application of smart homes, the wiring system is simplified, and the development of smart homes is promoted.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (10)

1. The utility model provides a low pressure electric heat decorative board, its characterized in that, including panel, bottom plate, insulating layer and low pressure electric heat membrane, the conductor has been laid to the low pressure electric heat membrane, the surface coating of low pressure electric heat membrane and conductor has insulating waterproof glue layer, low pressure electric heat membrane and conductor set up in between panel and the bottom plate, the insulating layer sets up between low pressure electric heat membrane and bottom plate, the surface of panel and bottom plate is provided with heat-resisting finish coat, heat-resisting finish coat is equipped with the position sign of low pressure electric heat membrane and conductor, panel, bottom plate, insulating layer and low pressure electric heat membrane form overall structure through the high temperature resistant gluing agent veneer.
The low-voltage electric heating film is prepared by mixing 40-70 parts by weight of nano-cellulose, 5-25 parts by weight of carbon nano-tubes, 5-25 parts by weight of graphene and 5-20 parts by weight of conductive nano-metals.
2. The low-voltage electric heating veneer according to claim 1, wherein the low-voltage electric heating film contains a flame retardant which is a phosphorus flame retardant and/or a nitrogen-phosphorus composite flame retardant.
3. The low-voltage electrothermal veneer according to claim 1, wherein the width of the contact surface between the low-voltage electrothermal film and the conductor is not less than 5 mm.
4. The low-voltage electric heating veneer according to claim 1, wherein the nanocellulose has a length of 0.5 to 5 μm and a diameter of 0.5 to 20 nm; the carbon nano tube has the diameter of 5-80 nm, the length of 1-15 mu m, the conductivity of more than 160s/cm and the bulk density of 2.0g/cm 3-2.3 g/cm 3; the thickness of the graphene is 0.5-8 nm, the median particle size is 0.5-6 μm, and the number of layers is 4-8; the particle size of the conductive nano metal is 50-300 nm.
5. The low-voltage electric heating veneer according to claim 1, wherein the heat-resistant veneer layer can be formed by hot pressing, finishing or compounding and is formed by hot pressing decorative paper impregnated with an environment-friendly modified melamine resin, wherein the mass ratio of urea-formaldehyde resin to melamine-formaldehyde resin in the environment-friendly modified melamine resin is 1: and 9, 3-4% of a composite additive, wherein the composite additive is formed by mixing waterborne polyurethane, methacrylic acid and silicate, and the formaldehyde emission of the adhesive film paper is less than or equal to 0.3 mg/L.
6. The low-voltage electric heating veneer according to claim 1, wherein the heat insulation layer is a high-temperature-resistant heat insulation material which is an organic high-temperature-resistant heat insulation coating or a heat insulation film and 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, 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. The low-voltage electric heating veneer according to claim 1, wherein the bottom plate and the face plate are any one or combination of a shaving board, a medium-density fiberboard, an oriented strand board and a plywood, the artificial board is of a homogeneous structure and is made of isocyanate adhesive, and the formaldehyde emission is less than or equal to 0.03mg/m3。
8. The preparation method of the low-voltage electric heating veneer is characterized by comprising the following steps:
(1) pouring the nano-cellulose into water, and mixing to prepare nano-cellulose suspension;
(2) pouring carbon nanotubes, graphene and conductive nano metal into the nano cellulose suspension for mixing;
(3) flattening and drying the mixed solution prepared in the step (2) to obtain the low-voltage heat-conducting conductive film;
(4) selecting materials and designing, selecting proper materials according to actual use requirements and designing, and determining the specification and size, laying position, direction, quantity, spacing and the like of the conductor and the low-voltage electrothermal film;
(5) coating high-temperature-resistant heat-insulating coating on the bottom plate or paving a heat-insulating film to form a heat-insulating layer, coating insulating waterproof glue on the heat-insulating layer, and applying glue in a certain amount150 to 200g/m2；
(6) Laying and fixing the low-voltage electric heating film and the conductor on the bottom plate, and fixing the low-voltage electric heating film and the conductor on the gluing surface of the bottom plate by using U-shaped nails;
(7) the panel is coated with insulating waterproof glue, and the glue application amount is 150-200 g/m2；
(8) Assembling and cold pressing for compounding, wherein the gluing surface of the panel covers the low-voltage electric heating film and the conductor for assembling and compounding, and the low-voltage electric heating film and the conductor are shaped by a cold press, and the cold pressing technological parameters are as follows: 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 adopting decorative paper impregnated with amino resin through hot pressing, paving the decorative paper on the surface of the composite plate prepared in the step (8), entering a hot press for pressing and trimming, wherein the hot pressing technological parameters are as follows: and marking the positions of the low-voltage electric heating film and the conductor on the board surface by using non-stick glue or colored adhesive tapes after the pressing and pasting is finished under the pressure of 8-20 MPa, the temperature of 120-210 ℃ and the time of 16-350 s, so as to obtain the low-voltage electric heating veneer.
9. The preparation method of the low-voltage electric heating veneer according to claim 8, wherein in the step (1), the addition amount of the nanocellulose accounts for 0.2-5% of the mass of water.
10. The method for preparing a low-voltage electrothermal veneer according to claim 8, wherein the low-voltage electrothermal film prepared in the step (3) is subjected to dipping and drying treatment by using a flame retardant solution.
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Publication number Priority date Publication date Assignee Title
CN206807799U (en) * 2016-12-02 2017-12-26 肖议 A kind of electric heat-emitting board based on graphene technology
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
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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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