CN106263523B

CN106263523B - Wooden multilayer glued electric heating plate and preparation method thereof

Info

Publication number: CN106263523B
Application number: CN201610648686.4A
Authority: CN
Inventors: 叶佐梁; 张恩光; 叶佐钲
Original assignee: Individual
Current assignee: ANHUI BEIJI LANTIAN BIOTECHNOLOGY CO.,LTD.
Priority date: 2016-08-09
Filing date: 2016-08-09
Publication date: 2020-07-07
Anticipated expiration: 2036-08-09
Also published as: CN106263523A

Abstract

The invention provides a wooden multilayer glued electric heating plate which is characterized in that a wooden veneer layer, a first gluing layer, a coating layer, a conductive substrate layer, a coating layer, a second gluing layer and a wooden veneer layer are sequentially arranged from bottom to top, wherein the conductive substrate layer comprises conductive copper slurry and carbon crystal slurry, and is connected with a temperature sensor and a full-automatic temperature regulator through a power line; the first cementing layer is a water-based adhesive composition, and the thickness of the first cementing layer is 7-12 mm; the second cementing layer is a water-based adhesive composition, and the thickness of the second cementing layer is 5-10 mm; the coating layer is a water-based flame-retardant coating composition, the water-based flame-retardant coating composition comprises modified argil powder, animal hide glue and water, and the modified argil powder is phosphate ester salt surfactant and betaine surfactant modified argil powder.

Description

Wooden multilayer glued electric heating plate and preparation method thereof

Technical Field

The invention relates to a carbon crystal electric heating plate, in particular to a wooden multilayer glued electric heating plate and a preparation method thereof.

Background

The carbon fiber has the characteristics of electric conduction, heat conduction, oxidation resistance (the carbon fiber can be used for a long time at 300 ℃), light weight, small diameter, small resistance temperature coefficient, stable electrical property, far infrared radiation, shielding or damping electromagnetic wave interference and the like. The carbon crystal electric heating plate is a heating device formed by modifying carbon fibers, performing ball milling treatment to prepare carbon crystal particles, and hermetically compounding the carbon crystal particles and a high-strength insulating material at high temperature and high pressure.

The heating principle of the carbon crystal electric heating plate is as follows: under the action of an electric field, carbon molecular groups in the heating body generate molecular motion, violent friction and impact are generated among carbon atoms, generated heat is outwards transferred in the form of far infrared radiation and convection, and the conversion rate of electric energy and heat energy is up to more than 98%. The carbon crystal electric heating plate system fully utilizes the excellent plane heating characteristic of the carbon crystal plate, the whole plane is synchronously heated during heating, continuous heating is realized, and the heat balance effect is good. Overcomes the defects of discontinuous heating and poor heat balance effect of the traditional heating product. The carbon crystal low-temperature radiation heating system is a product taking far infrared low-temperature radiation as a main energy transfer mode, and a human body is in a low-temperature radiation environment just like being placed under the sunlight, so that the comfort level of a living environment is improved. The carbon crystal electric heating plate radiates far infrared rays outwards while heating. The far infrared ray has effects of improving and preventing various diseases caused by blood circulation and microcirculation disturbance.

The carbon crystal electric heating plate has low installation and maintenance cost and long service life, the surface temperature of the carbon crystal electric heating plate is rapidly increased from the ambient temperature within ten seconds of electrification, the carbon crystal electric heating plate is heated outwards at a constant temperature, and the set temperature can be reached within 3-5 minutes. The product has the characteristics of high efficiency, energy conservation, economy, no pollution, long service life, controllable temperature and the like, and the use cost is only about half of that of the common electric heating. And the maintenance is not needed, and the service life of the product is equivalent to that of a building. However, the existing preparation method of the carbon crystal plate is still imperfect, and potential safety hazards also exist in the use process of the carbon crystal heating plate (for example, the rising temperature of the carbon crystal electric heating plate is higher than 100 ℃, and the floor can be burnt, the furniture can be baked to be broken and even the fire can be caused by the prolonged time).

Therefore, there is a need for a carbon crystal electric heating plate with excellent properties of safety, flame retardance, water resistance, moisture resistance, chemical corrosion resistance and the like, and the preparation process of the carbon crystal electric heating plate is simple.

Disclosure of Invention

In order to solve the above problems, an aspect of the present invention provides a wooden multi-layer glued electric heating plate, which is sequentially arranged from bottom to top a wooden veneer layer, a first gluing layer, a coating layer, a conductive substrate layer, a coating layer, a second gluing layer, and a wooden veneer layer, wherein the conductive substrate layer includes conductive copper paste and carbon crystal paste, and is connected to a temperature sensor and a full-automatic temperature regulator through a power line; the first cementing layer is a water-based adhesive composition, and the thickness of the first cementing layer is 7-12 mm; the second cementing layer is a water-based adhesive composition, and the thickness of the second cementing layer is 5-10 mm; the coating layer is a water-based flame-retardant coating composition, the water-based flame-retardant coating composition comprises modified argil powder, animal hide glue and water, and the modified argil powder is phosphate ester salt surfactant and betaine surfactant modified argil powder.

In one embodiment, the aqueous flame retardant coating composition comprises, in parts by weight:

20-36 parts of modified argil powder

10-20 parts of animal skin glue

50-70% of water.

20-30 parts of modified argil powder

10-20 parts of animal skin glue

50-65% of water.

In one embodiment, the modified kaolin powder comprises a phosphate surfactant, a betaine surfactant and a kaolin powder in a mass ratio of (0.001-0.12): (0.001-0.15): 1.

in one embodiment, the modified kaolin powder comprises a phosphate surfactant, a betaine surfactant and a kaolin powder in a mass ratio of (0.001-0.1): (0.001-0.1): 1.

in one embodiment, the phosphate ester surfactant is a castor oil phosphate ester surfactant.

In one embodiment, the aqueous adhesive composition comprises, in parts by weight:

wherein the attapulgite clay powder is obtained by acidifying, blending, airing and grinding 10-20 parts by weight of attapulgite clay and 10-15 parts by weight of clay powder, and the [ M (C)₅H₄NCOO)₂]·4H₂M in O is one or more of Ni, Cu and Fe.

The invention also provides a preparation method of the wooden multi-layer glued electric heating plate, which comprises the following steps:

(1) coating a water-based adhesive composition on a wood veneer, drying, spraying a water-based flame retardant coating composition, drying and sanding;

(2) screen printing conductive copper paste and carbon crystal paste on the smooth surface of the plywood sprayed with the water-based flame-retardant coating composition in the step (1), and drying at 120 ℃ for 10-60 min to obtain a conductive substrate layer;

(3) welding a power line on the conductive substrate layer in the step (2);

(4) carrying out pressure bonding on the conductive substrate of the welding power line in the step (3) and the wood veneer coated with the water-based adhesive composition and the water-based flame-retardant coating composition;

(5) and (3) assembling a temperature sensor and a full-automatic temperature regulator on the power line in the step (2).

In one embodiment, the grain size of the carbon crystal in the carbon crystal slurry in the step (2) is 1000 to 3000 meshes.

In one embodiment, the wooden multi-layer glued electric heating plate is applied to a carbon crystal heating wall plate, a carbon crystal heating floor and a carbon crystal heating table top.

The above-described and other features, aspects, and advantages of the present application will become more apparent with reference to the following detailed description.

Detailed Description

The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.

The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.

The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.

Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.

In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.

"Polymer" means a polymeric compound prepared by polymerizing monomers of the same or different types. The generic term "polymer" embraces the terms "homopolymer", "copolymer", "terpolymer" and "interpolymer".

"interpolymer" means a polymer prepared by polymerizing at least two different monomers. The generic term "interpolymer" includes the term "copolymer" (which is generally used to refer to polymers prepared from two different monomers) and the term "terpolymer" (which is generally used to refer to polymers prepared from three different monomers). It also includes polymers made by polymerizing more monomers. "blend" means a polymer formed by two or more polymers being mixed together by physical or chemical means.

The invention provides a wooden multilayer glued electric heating plate which is characterized in that a wooden veneer layer, a first cementing layer, a coating layer, a conductive substrate layer, a coating layer, a second cementing layer and a wooden veneer layer are sequentially arranged from bottom to top, wherein the conductive substrate layer comprises conductive copper slurry and carbon crystal slurry, and is connected with a temperature sensor and a full-automatic temperature regulator through a power line; the first cementing layer is a water-based adhesive composition, and the thickness of the first cementing layer is 7-12 mm; the second cementing layer is a water-based adhesive composition, and the thickness of the second cementing layer is 5-10 mm; the coating layer is a water-based flame-retardant coating composition, the water-based flame-retardant coating composition comprises modified argil powder, animal hide glue and water, and the modified argil powder is phosphate ester salt surfactant and betaine surfactant modified argil powder.

Carbon crystal

The carbon crystal is a modified and purified carbon particle heating product, short carbon fiber is modified and then ball-milled to prepare microcrystal particles, and then far infrared emitting agent is added to synthesize and prepare the heating element by a special process. The working principle is that under the action of an alternating electric field, carbon atoms collide with each other and rub to generate molecular motion, so that heat energy is generated, a large amount of infrared radiation is generated, and the conversion rate of electric energy and heat energy reaches more than 98%. The surface temperature of the heating body is rapidly increased from the ambient temperature within thirty seconds after the electric conduction, a set temperature can be reached within 3-5 minutes, heat energy is transferred to the covering on the surface of the carbon crystal electric heating material and the heat insulation material on the back of the carbon crystal electric heating material, the heat insulation material continuously reflects the heat energy to the covering on the surface of the heating body, the surface temperature of the heating body is continuously increased, after 2-4 minutes, the heating body and the heat insulation material reach thermal state balance, heat radiation is carried out at constant temperature, and the infrared radiation of the heating body can not generate high-frequency radiation. The product has no ultraviolet rays and visible light, is harmless to human body, and can improve microcirculation, promote metabolism, improve immunity, and is beneficial to health. The wavelength of the infrared radiation is between 8 and 18 microns.

20-36 parts of modified argil powder

10-20 parts of animal skin glue

50-70% of water.

20-30 parts of modified argil powder

10-20 parts of animal skin glue

50-65% of water.

Animal skin glue

Collagen is a structural protein of extracellular matrix, contains one or several triple helical structures composed of α -chain, its molecules are aggregated in extracellular matrix as supramolecular structure, accounting for about 85% of collagen fiber solids, accounting for 25% -30% of total protein in vivo, corresponding to 6% of body weight, collagen is also a polysaccharide protein, containing small amount of galactose and glucose, it has certain difference in color according to extraction method or source, generally white and yellow, generally protein contains 20 amino acids, collagen contains 18 amino acids, wherein cystine and tryptophan are absent, but some collagen listed in literature does not lack these two amino acids, only in small amount, because research on collagen amino acid composition will have influence on analysis result due to analysis determination method of amino acid and hydrolysis condition, and the result is different, secondly collagen contains large amount of glycine, accounting for about 27% of total amino acid, its primary structure is a/Gly-X-Y repeated sequence, wherein X is proline, Y is light proline, respectively accounting for about 14%, the latter two are amino acids, which are cyclic amino acids, and the whole collagen has strong elasticity, thus the whole collagen is considered as a strong elastic structure.

in one embodiment, the modified kaolin powder comprises a phosphate surfactant, a betaine surfactant and a kaolin powder in a mass ratio of (0.001-0.1): (0.001-0.1): 1; preferably, the mass ratio of the phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is (0.003-0.06): (0.003-0.08): 1.

Phosphate ester salt surfactant

The phosphate ester is used as a dispersant to disperse the surface activity in the coating, so that the gloss and the coloring property of the coating can be obviously enhanced, the wettability of the surface can be improved, and better dispersibility can be provided.

The castor oil is colorless or light yellow viscous transparent liquid, and is a non-volatile, non-irritant and non-drying oil. The castor oil is only one oil mainly containing hydroxy acid, the hydroxyl value is more than 155mg KOH/g, the castor oil mainly contains triglyceride of ricinoleic acid, and triglyceride molecules of the castor oil are not arranged on the same plane. The ricinoleic acid molecular structure contains a plurality of special functional groups, for example, hydroxyl groups existing in the molecular formula are easy to form hydrogen bonds, so that the viscosity of the ricinoleic acid molecular structure is 8-10 times greater than that of common vegetable oil; meanwhile, hydroxyl and unsaturated double bonds are arranged on the branched chain, and hydrolysis, esterification, addition, oxidation, cracking, epoxidation, amidation, dehydration and other reactions can be carried out.

In one embodiment, the method for preparing the castor oil phosphate ester surfactant comprises the steps of:

(1) adding P into a reaction bottle according to a molar ratio₂O₅Alcohol ether (AEO-3) phosphate, stirring, mixing, adding castor oil (controlling temperature below 40 deg.C during charging);

(2) heating the solution obtained in the step (1) to 80 ℃, preserving the temperature for 4h, and then adding deionized water to perform hydrolysis reaction for 1.5h, wherein P is₂O₅The mass ratio of the castor oil to the alcohol ether (AEO-3) phosphate is 1: 3: 1,

the mass ratio of the castor oil to the deionized water is 1: 0.05;

(3) after the hydrolysis is completed, the temperature of the system is reduced to below 40 ℃, a certain amount of NaOH solution with the mass fraction of 15% is added, the pH of the reaction system is adjusted to be neutral or alkalescent, the temperature is controlled to be about 50 ℃, the reaction is carried out for 30min, the filtration is carried out, and the decompression drying is carried out for 16h at the temperature of 80 ℃.

In one embodiment, the castor oil phosphate salt has a critical micelle concentration (cmc) of 1.2 to 1.5g/l and an HLB value of 13 to 16.

Betaine surfactant

The betaine-type amphoteric surfactant is a substance containing an inner salt structure, and can exhibit cationic, anionic or nonionic properties in a solution according to the change in the pH of the solution. The betaine amphoteric surfactant is easy to dissolve in water, has good hard water resistance, good antistatic property, good bactericidal effect and good compatibility with various surfactants, and is widely applied to daily life and industrial production.

In one embodiment, the betaine-type surfactant is one or more of dodecyl dimethyl betaine, dodecyl trimethyl betaine, N- (lauramidopropylidene) dimethyl betaine; preferably, the betaine type amphoteric surfactant is one or more of dodecyl dimethyl betaine and dodecyl trimethyl betaine; more preferably, the betaine-type amphoteric surfactant is dodecyl trimethyl betaine.

Argil powder

Pottery clay, kaolin, clay, chemical name of hydrated aluminum silicate, and molecular formula of Al₂0₃·2Si0₂·2H₂O, molecular weight of 261.96, density of 2.54-2.60 mg/m3, melting point of 1785 ℃ and refractive index of 1.56. Slightly soluble in hydrochloric acid or acetic acid, easily dispersible in water or other solution, and resistant to dilute acid and alkali.

The pottery clay mainly comprises kaolinite, hydrowhite mica, montmorillonite, quartz and feldspar. The particles are of different sizes and often contain sand, silt, clay and the like. The water-absorbing and water-permeable floor mat has the advantages of water absorption, adsorbability, excellent freeze-thaw resistance, good light pollution resistance, sound absorption, good air permeability, water permeability and good weather and corrosion resistance, and has plasticity, impure color, yellow and gray color and the like after being added with water.

The pottery clay particles are flaky or spherical particles which are made from high-quality clay as a raw material through a series of processes such as agglomeration, firing and the like, and have the advantages of uniform particle size, high strength, microporous surface, strong adsorption capacity and long service life.

In one embodiment, the preparation method of the modified argil powder comprises the following steps:

(1) grinding argil powder, sieving, screening argil powder with the particle size of 300-400 meshes, and drying at 120 ℃ for 2 hours;

(2) adding ethanol, a borate coupling agent, castor oil phosphate and a betaine surfactant into the argil powder treated in the step (1), heating to 85 ℃, preserving heat for 1h, cooling to room temperature, filtering, and drying under reduced pressure at 80 ℃ for 10 h; the mass ratio of the borate coupling agent to the ethanol is 30: 100, wherein the mass ratio of the argil powder to the borate coupling agent is 1: 0.03, wherein the mass ratio of the castor oil phosphate salt surfactant, the betaine surfactant and the argil powder in the modified argil powder is (0.003-0.06): (0.003-0.08): 1.

the main components of china clay are kaolinite and illite, and the kaolinite and illite layered silicate minerals, and the crystal structure comprises two basic crystal plates, namely tetrahedral plates and octahedral plates. When the argil sample is broken, the original chemical bonds of silicon and aluminum atoms on the surface of the mineral particles are partially broken to become unsaturated, and water molecules or oxygen in the air can be adsorbed to combine into hydroxyl. These hydroxyl groups have relatively high activity and surface free energy, and are hydrophilic.

The surfactant molecule is composed of two parts, a polar hydrophilic group and a non-polar hydrophobic group. When modification treatment is carried out, molecules of phosphate ester surfactant and betaine surfactant are contacted with mineral particle crystals to generate adsorption and chemical bonding effects, and part of polar hydrophilic groups in the molecules of the surfactant are adsorbed on the surfaces of the crystals, so that physical adsorption is realized; the other part is chemically bonded with active groups AI-OH and Si-O on the surface of the mineral and loses water molecules.

In addition, after modification treatment, part of nonpolar hydrophobic groups in the surfactant molecules face outwards and cover and wrap the surface of the mineral, so that the clay mineral has hydrophilicity and lipophilicity. Therefore, when the modified clay is added into animal skin glue, the non-polar alkyl-R covering the surface of the mineral reduces the surface tension and the surface free energy of the contact interface of the modified clay due to the similarity with the animal skin glue, increases the compatibility of the non-polar alkyl-R and the surface free energy of the contact interface of the non-polar alkyl-R, improves the bonding strength of the non-polar alkyl-R and the animal skin glue, improves the tensile strength of the animal skin glue added with the active clay and has certain reinforcing effect.

Attapulgite pottery clay powder

The attapulgite argil powder has fine and smooth texture, unique dispersibility, good thixotropic property, strong water absorption, and viscosity and plasticity when wet.

In one embodiment, the preparation method of the attapulgite clay powder comprises the following steps:

(1) mixing attapulgite clay and argil powder in parts by weight, and crushing, wherein the particle fineness of the crushed mixture is less than 0.5 mm;

(2) adding the powdery mixture into a soaking and ageing pool, and soaking and sinking the powdery mixture with water for ageing for 7-30 days to obtain a semi-finished product;

(3) conveying the semi-finished product into a vacuum extruder to extrude the semi-finished product into cylindrical strips, wherein the diameter of each cylindrical strip is controlled to be 2-10 mm;

(4) inputting the cylindrical strip-shaped objects into a cement drying yard for drying in the sun, wherein the water content of the cylindrical strip-shaped objects after drying in the sun is less than 15%;

(5) and (3) feeding the aired cylindrical strip-shaped object into a grinder to grind the cylindrical strip-shaped object into powder, wherein the particle fineness of the powder is less than 15 micrometers.

In one embodiment, the coordination compound [ M (C)₅H₄NCOO)₂]·4H₂In O [ Ni (C) ]₅H₄NCOO)₂]·4H₂O and [ Cu (C) ]₅H₄NCOO)₂]·4H₂O、[Fe(C₅H₄NCOO)₂]·4H₂The molar ratio of O is (0.1-0.18): (0.1-0.42): 1.

[Ni(C₅H₄NCOO)₂]·4H₂the preparation method of O comprises the following steps:

mixing NiCl₂·6H₂O (2.4g, 10.0mmol), KSCN (1.0g, 10.0mmol), isonicotinic acid (2.5g, 10.0mmol) and sodium hydroxide (0.8g, 20.0mmol) were added to a 250ml three-necked flask with ethanol (80ml) and water (20ml), mixed well, heated at 130 ℃ for 72 hours, after completion of the reaction, cooled to room temperature, filtered and dried.

[Cu(C₅H₄NCOO)₂]·4H₂The preparation method of O comprises the following steps:

mixing CuSO₄·5H₂O (2.5g, 10.0mmol), 4-cyanopyridine (1.0g, 10.0mmol) and KSCN (1.0g, 10.0mmol) were put in a 250ml three-necked flask with methanol (25ml) and water (50ml), and after thoroughly mixing, the mixture was heated at 130 ℃ for 72 hours, after completion of the reaction, the temperature was lowered to room temperature, and then the mixture was filtered and dried.

[Fe(C₅H₄NCOO)₂]·4H₂The preparation method of O comprises the following steps:

FeCl is added₃·6H₂O (4.1g, 15.0mmol), 4-cyanopyridine (3.1g, 30.0mmol) and KSCN (1.0g, 10.0mmol) were added to a 250ml three-necked flask with ethanol (90ml) and water (20ml), and after thorough mixing, the mixture was heated at 130 ℃ for 72 hours, after completion of the reaction, the temperature was lowered to room temperature, filtered and dried.

In one embodiment, the method of making the aqueous binder composition comprises the steps of:

(1) soaking the animal skin glue in an aqueous solution according to the parts by weight;

(2) adding the animal skin glue and the aqueous solution in the step (1) into a heating container, and heating to 70 ℃;

(3) when the animal hide glue in the step (2) is completely dissolved in the water solution, slowly and sequentially adding attapulgite argil powder, sodium tetraborate and coordination compound [ M (C) according to the weight parts₅H₄NCOO)₂]·4H₂O and surfactant are stirred until the solid is completely melted;

(4) and (4) cooling the reaction liquid in the step (3) to room temperature to obtain the aqueous adhesive composition.

According to the invention, the attapulgite argil powder which can keep flowing randomly in a powdery form and can absorb water with the mass of 100-fold and 500-fold is added into the animal hide glue, so that the aims of keeping the toughness of the animal hide glue for a long time, enabling the animal hide glue to have high bonding strength and being capable of being dried quickly in a short time are fulfilled. The addition of the silicate with large specific surface area can greatly improve the adsorption capacity of the flaky animal skin glue, and the animal skin glue can be changed from a flowing state to a dry state, so that the drying time of the animal skin glue is shortened, and the toughness is enhanced.

Ni in the complex²⁺、Cu²⁺、Fe²⁺Performing coordination reaction with-NH and C ═ O in peptide chains of bone glue molecules to allow Ni to pass through each peptide chain of the bone glue molecules²⁺、Cu²⁺、Fe²⁺The cross-linking together forms a stable net structure, promotes the surface of the animal skin glue film to be more regular, smooth and compact than the surface of the bone glue film, thereby enhancing the water resistance.

(3) welding a power line on the conductive substrate layer in the step (2);

In one embodiment, the first glue layer composed of the aqueous adhesive composition in the step (1) has a thickness of 7mm to 12 mm; preferably, the thickness of the first glue layer consisting of the aqueous adhesive composition in step (1) is 9 mm.

In one embodiment, the grain size of the carbon crystal in the carbon crystal slurry in the step (2) is 1000 to 3000 meshes; preferably, the grain size of the carbon crystal in the carbon crystal slurry in the step (2) is 1500-2500 meshes.

In one embodiment, the thickness of the second cementing layer consisting of the aqueous adhesive composition in the step (4) is 5mm to 10 mm; preferably, the thickness of the second glue layer consisting of the aqueous adhesive composition in step (4) is 7 mm.

In one embodiment, the working temperature of the wooden multi-layer glued electric heating plate is in a range of 10-80 ℃; preferably, the working temperature range of the wooden multi-layer glued electric heating plate is 10-50 ℃.

According to the invention, pottery clay powder is modified, and molecules of phosphate ester surfactant and betaine surfactant are contacted with mineral particle crystals to generate adsorption and chemical bonding; after modification treatment, part of nonpolar hydrophobic groups in the surfactant molecules face outwards and cover and wrap the surface of the mineral, so that the clay mineral has hydrophilicity and lipophilicity. Therefore, when the modified clay is added into animal skin glue, the non-polar alkyl-R covering the surface of the mineral is similar to the animal skin glue, so that the surface tension and the surface free energy of a contact interface of the modified clay are reduced, the compatibility of the modified clay and the animal skin glue is increased, the bonding strength of the modified clay and the animal skin glue is improved, and the tensile strength of the animal skin glue added with the activated clay is improved; in addition, the introduction of the phosphate group improves the flame retardant effect of the water-based flame retardant coating and also improves the safety of the wooden multilayer glued electric heating plate during working.

The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.

In addition, the raw materials used are commercially available from national chemical reagents, unless otherwise specified.

Example 1

The preparation method of the wooden multi-layer glued electric heating plate comprises the following steps:

(1) coating a water-based adhesive composition on a wood veneer, drying, spraying a water-based flame retardant coating composition, drying and sanding; the thickness of the aqueous adhesive composition is 7 mm;

(2) screen printing conductive copper paste and carbon crystal paste on the smooth surface of the plywood sprayed with the water-based flame-retardant coating composition in the step (1), and drying at 120 ℃ for 30min to obtain a conductive substrate layer; the grain size of carbon crystals in the carbon crystal slurry is 1000 meshes;

(3) welding a power line on the conductive substrate layer in the step (2);

(4) carrying out pressure bonding on the conductive substrate of the welding power line in the step (3) and the wood veneer coated with the water-based adhesive composition and the water-based flame-retardant coating composition; the thickness of the aqueous adhesive composition is 5 mm;

Wherein the water-based flame-retardant coating composition comprises the following components in parts by weight:

modified argil powder 15

Animal skin glue 10

50 parts of water;

the preparation method of the modified argil powder comprises the following steps:

(1) grinding argil powder, sieving, screening argil powder with particle size of 300 meshes, and drying at 120 ℃ for 2 h;

(2) adding ethanol, a borate coupling agent, castor oil phosphate and a betaine surfactant into the argil powder treated in the step (1), heating to 85 ℃, preserving heat for 1h, cooling to room temperature, filtering, and drying under reduced pressure at 80 ℃ for 10 h; the mass ratio of the borate coupling agent to the ethanol is 30: 100, wherein the mass ratio of the argil powder to the borate coupling agent is 1: 0.03, wherein the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.001: 0.12: 1.

the preparation method of the aqueous adhesive composition comprises the following steps:

(1) soaking 5.5 parts by weight of A1, 7 parts by weight of A2, 0.4 part by weight of A3 and 0.1 part by weight of A4 in 60 parts by weight of an aqueous solution (the mass ratio of D1 to D2 is 8.5: 1); the A1: pigskin glue (Rongchang adult pigskin): the freezing value is 320, the weight average molecular weight is 80000, and the particle size of the particles is 3 mm; the A2: kraft glue (cattle): the freezing value is 330, the weight average molecular weight is 60000, and the particle size of the particle is 3 mm; the A3: sheepskin glue (goat): the freezing value is 200, the weight average molecular weight is 18000, and the particle size of the particles is 3 mm; the A4: horse hide glue: the freezing value is 221, the weight-average molecular weight is 12000, and the particle size of the particles is 3 mm; d1: purified water; d2: ethanol;

(2) adding the A1, the A2, the A3 and the A4 in the step (1) and the aqueous solution into a 250ml reaction bottle, heating, and heating to 70 ℃;

(3) after A1, A2, A3 and A4 in the step (2) are completely dissolved in the aqueous solution, slowly adding 25 parts by weight of C1, 0.4 part by weight of E1, 0.8 part by weight of E2, 2.8 parts by weight of E3 and 3 parts by weight of F1, and stirring until all solids are dissolved and fused; the C1: the particle size of the attapulgite argil powder is 8 mu m; the E1: [ Ni (C)₅H₄NCOO)₂]·4H₂O; the E2: [ Cu (C)₅H₄NCOO)₂]·4H₂O; the E3: [ Fe (C)₅H₄NCOO)₂]·4H₂O; the F1: sodium lauryl sulfate;

(4) cooling the reaction liquid in the step (3) to room temperature, adding 0.6 weight part of B1, and uniformly stirring to obtain an aqueous adhesive composition; the B1: sodium tetraborate.

Example 2

(1) coating a water-based adhesive composition on a wood veneer, drying, spraying a water-based flame retardant coating composition, drying and sanding; the thickness of the aqueous adhesive composition is 8 mm;

(2) screen printing conductive copper paste and carbon crystal paste on the smooth surface of the plywood sprayed with the water-based flame-retardant coating composition in the step (1), and drying at 120 ℃ for 30min to obtain a conductive substrate layer; the grain size of carbon crystals in the carbon crystal slurry is 1200 meshes;

(3) welding a power line on the conductive substrate layer in the step (2);

(4) carrying out pressure bonding on the conductive substrate of the welding power line in the step (3) and the wood veneer coated with the water-based adhesive composition and the water-based flame-retardant coating composition; the thickness of the aqueous adhesive composition is 9 mm;

modified argil powder 20

Animal hide glue 12

61, water;

(1) grinding argil powder, sieving, screening argil powder with particle size of 320 meshes, and drying at 120 ℃ for 2 h;

(2) adding ethanol, a borate coupling agent, castor oil phosphate and a betaine surfactant into the argil powder treated in the step (1), heating to 85 ℃, preserving heat for 1h, cooling to room temperature, filtering, and drying under reduced pressure at 80 ℃ for 10 h; the mass ratio of the borate coupling agent to the ethanol is 30: 100, wherein the mass ratio of the argil powder to the borate coupling agent is 1: 0.03, wherein the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.003: 0.1: 1.

the aqueous binder composition was prepared in the same manner as in example 1.

Example 3

(1) coating a water-based adhesive composition on a wood veneer, drying, spraying a water-based flame retardant coating composition, drying and sanding; the thickness of the aqueous adhesive composition is 9 mm;

(2) screen printing conductive copper paste and carbon crystal paste on the smooth surface of the plywood sprayed with the water-based flame-retardant coating composition in the step (1), and drying at 120 ℃ for 30min to obtain a conductive substrate layer; the grain size of carbon crystals in the carbon crystal slurry is 1500 meshes;

(3) welding a power line on the conductive substrate layer in the step (2);

modified argil powder 25

Animal skin glue 10

61, water;

(1) grinding argil powder, sieving, screening argil powder with the particle size of 340 meshes, and drying at 120 ℃ for 2 hours;

(2) adding ethanol, a borate coupling agent, castor oil phosphate and a betaine surfactant into the argil powder treated in the step (1), heating to 85 ℃, preserving heat for 1h, cooling to room temperature, filtering, and drying under reduced pressure at 80 ℃ for 10 h; the mass ratio of the borate coupling agent to the ethanol is 30: 100, wherein the mass ratio of the argil powder to the borate coupling agent is 1: 0.03, wherein the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.005: 0.12: 1.

the aqueous binder composition was prepared in the same manner as in example 1.

Example 4

(3) welding a power line on the conductive substrate layer in the step (2);

(4) carrying out pressure bonding on the conductive substrate of the welding power line in the step (3) and the wood veneer coated with the water-based adhesive composition and the water-based flame-retardant coating composition; the thickness of the aqueous adhesive composition is 10 mm;

modified argil powder 25

Animal hide glue 12

66 parts of water;

the method comprises the following steps:

(1) grinding argil powder, sieving, screening argil powder with the particle size of 350 meshes, and drying at 120 ℃ for 2 hours;

(2) adding ethanol, a borate coupling agent, castor oil phosphate and a betaine surfactant into the argil powder treated in the step (1), heating to 85 ℃, preserving heat for 1h, cooling to room temperature, filtering, and drying under reduced pressure at 80 ℃ for 10 h; the mass ratio of the borate coupling agent to the ethanol is 30: 100, wherein the mass ratio of the argil powder to the borate coupling agent is 1: 0.03, wherein the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.005: 0.1: 1.

the aqueous binder composition was prepared in the same manner as in example 1.

Example 5

(1) coating a water-based adhesive composition on a wood veneer, drying, spraying a water-based flame retardant coating composition, drying and sanding; the thickness of the aqueous adhesive composition is 12 mm;

(2) screen printing conductive copper paste and carbon crystal paste on the smooth surface of the plywood sprayed with the water-based flame-retardant coating composition in the step (1), and drying at 120 ℃ for 30min to obtain a conductive substrate layer; the grain size of carbon crystals in the carbon crystal slurry is 2000 meshes;

(3) welding a power line on the conductive substrate layer in the step (2);

modified pottery clay powder 30

Animal hide glue 18

66 parts of water;

(2) adding ethanol, a borate coupling agent, castor oil phosphate and a betaine surfactant into the argil powder treated in the step (1), heating to 85 ℃, preserving heat for 1h, cooling to room temperature, filtering, and drying under reduced pressure at 80 ℃ for 10 h; the mass ratio of the borate coupling agent to the ethanol is 30: 100, wherein the mass ratio of the argil powder to the borate coupling agent is 1: 0.03, wherein the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.01: 0.10: 1.

the aqueous binder composition was prepared in the same manner as in example 1.

Example 6

(1) coating a water-based adhesive composition on a wood veneer, drying, spraying a water-based flame retardant coating composition, drying and sanding; the thickness of the aqueous adhesive composition is 10 mm;

(2) screen printing conductive copper paste and carbon crystal paste on the smooth surface of the plywood sprayed with the water-based flame-retardant coating composition in the step (1), and drying at 120 ℃ for 30min to obtain a conductive substrate layer; the grain size of carbon crystals in the carbon crystal slurry is 2500 meshes;

(3) welding a power line on the conductive substrate layer in the step (2);

(4) carrying out pressure bonding on the conductive substrate of the welding power line in the step (3) and the wood veneer coated with the water-based adhesive composition and the water-based flame-retardant coating composition; the thickness of the aqueous adhesive composition is 8 mm;

modified argil powder 32

Animal hide glue 18

66 parts of water;

(2) adding ethanol, a borate coupling agent, castor oil phosphate and a betaine surfactant into the argil powder treated in the step (1), heating to 85 ℃, preserving heat for 1h, cooling to room temperature, filtering, and drying under reduced pressure at 80 ℃ for 10 h; the mass ratio of the borate coupling agent to the ethanol is 30: 100, wherein the mass ratio of the argil powder to the borate coupling agent is 1: 0.03, wherein the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.07: 0.05: 1.

the aqueous binder composition was prepared in the same manner as in example 1.

Example 7

The preparation method of the wooden multilayer glued electric heating plate is different from the embodiment in that:

the thickness of the aqueous adhesive composition of the step (1) is 10 mm; the grain size of carbon crystals in the carbon crystal slurry is 2500 meshes; the thickness of the aqueous adhesive composition in the step (3) is 8 mm;

the water-based flame-retardant coating composition comprises the following components in parts by weight:

modified argil powder 32

Animal hide glue 18

66 parts of water;

the preparation method of the modified argil powder is the same as that of the example 4, and the differences are that: the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.05: 0.08: 1.

the preparation of the aqueous adhesive composition was the same as in example 1.

Example 8

the thickness of the aqueous adhesive composition in the step (3) is 7 mm; the grain size of carbon crystals in the carbon crystal slurry is 3000 meshes;

modified argil powder 36

Animal skin glue 20

70 parts of water;

the preparation method of the modified argil powder is the same as that of the example 4, and the differences are that: the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.06: 0.07: 1.

Example 9

the thickness of the aqueous adhesive composition in the step (3) is 7 mm; the grain size of carbon crystals in the carbon crystal slurry is 2500 meshes;

modified argil powder 26

Animal skin glue 13

60 parts of water;

the preparation method of the modified argil powder is the same as that of the example 4, and the differences are that: the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.08: 0.04: 1.

Example 10

the thickness of the aqueous adhesive composition in the step (3) is 7 mm; the grain size of carbon crystals in the carbon crystal slurry is 2000 meshes;

modified argil powder 26

Animal skin glue 13

60 parts of water;

the preparation method of the modified argil powder is the same as that of the example 4, and the differences are that: the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.1: 0.1: 1.

Example 11

modified argil powder 26

Animal skin glue 13

60 parts of water;

the preparation method of the modified argil powder is the same as that of the example 4, and the differences are that: the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.1: 0.15: 1.

Example 12

(3) welding a power line on the conductive substrate layer in the step (2);

(4) carrying out pressure bonding on the conductive substrate of the welding power line in the step (3) and the wood veneer coated with the water-based adhesive composition and the water-based flame-retardant coating composition; the thickness of the aqueous adhesive composition is 7 mm;

modified argil powder 26

Animal skin glue 13

61, water;

(2) adding ethanol, a borate coupling agent, castor oil phosphate and a betaine surfactant into the argil powder treated in the step (1), heating to 85 ℃, preserving heat for 1h, cooling to room temperature, filtering, and drying under reduced pressure at 80 ℃ for 10 h; the mass ratio of the borate coupling agent to the ethanol is 30: 100, wherein the mass ratio of the argil powder to the borate coupling agent is 1: 0.03, wherein the mass ratio of the castor oil phosphate ester surfactant, the betaine surfactant and the argil powder in the modified argil powder is 0.03: 0.08: 1.

Comparative example 1

(3) welding a power line on the conductive substrate layer in the step (2);

modified argil powder 26

Animal skin glue 13

61, water;

(2) adding ethanol, a borate coupling agent, castor oil phosphate and a betaine surfactant into the argil powder treated in the step (1), heating to 85 ℃, preserving heat for 1h, cooling to room temperature, filtering, and drying under reduced pressure at 80 ℃ for 10 h; the mass ratio of the borate coupling agent to the ethanol is 30: 100, wherein the mass ratio of the argil powder to the borate coupling agent is 1: 0.03, wherein the mass ratio of the phosphate surfactant to the argil powder in the modified argil powder is 0.1: 1.

the aqueous binder composition was prepared in the same manner as in example 1.

Comparative example 2

The preparation method of the wooden multilayer glued electric heating plate, the water-based flame-retardant coating composition, the preparation method of the modified argil powder and the preparation method of the water-based adhesive composition are the same as the comparative example 2, and the difference technical characteristics are that the mass ratio of the betaine type surfactant to the argil powder in the modified argil powder in the preparation method of the modified argil powder is 0.15: 1.

comparative example 3

(3) welding a power line on the conductive substrate layer in the step (2);

argil powder 26

Animal skin glue 13

61, water;

(3) after A1, A2, A3 and A4 in the step (2) are completely dissolved in the aqueous solution, slowly adding 25 parts by weight of C1, 0.4 part by weight of E1, 0.8 part by weight of E2, 2.8 parts by weight of E3 and 3 parts by weight of F1, and stirring until all solids are dissolved and fused; the C2: the grain diameter of the pottery clay powder is 8 mu m; the F1: sodium lauryl sulfate; (4) cooling the reaction liquid in the step (3) to room temperature, adding 0.6 weight part of B1, and uniformly stirring to obtain an aqueous adhesive composition; the B1: sodium tetraborate.

Performance testing

The standard is the standard specified in GB/T4654/2008 standard "general technical conditions for non-metal matrix infrared radiation heaters".

1. Moisture resistance: the heater subjected to the test was left in a test room having a normal atmospheric environment for 24 hours and then subjected to the test. The heater should be placed in the test chamber in an unpackaged, unpowered, "ready to use" and normal operating position or condition according to the relevant standards. The moisture treatment was carried out in a moisture chamber at a relative humidity of (93 + -2)% for 48h, the temperature of the air was maintained within 1K of any convenient value t between 20 and 30 deg.C, and the sample was brought to temperature t before being placed in the moisture chamber. After the test, the heater bears basic sine wave alternating current test voltage of 50Hz and 1500V under the condition of full heating, the duration is 1min, and the phenomena of breakdown and flashover are avoided.

Well: no breakdown and flashover phenomena;

not good: breakdown and flashover phenomena.

2. Tension force: the terminal of the heater was fastened on a tensile machine and a prescribed tensile force was applied for 3 min.

Well: no displacement and no fracture phenomenon;

not good: displacement and fracture phenomena occur.

3. Mechanical strength: the striking energy is (0.5 + -0.04) J per each possible weak point on the outer surface of the sample with a spring impactor, as specified in chapter 21 of GB 4706.1-2005, or is determined according to the specifications of the relevant product standards.

Excellent: no damage trace exists;

well: the damage trace is present, but the phenomena of fracture and damage are avoided;

not good: there are fracture and damage phenomena.

4. Flame retardant property: the test and evaluation were carried out according to the rule 30.102 of GB/T4706.8-2003.

5. Low temperature resistance: and setting the low-temperature test chamber at a specified test temperature, putting the sample into the low-temperature test chamber, storing for a specified time, taking out, recovering for 1h at room temperature, and detecting the input power, the surface temperature, the electrical strength and the appearance of the sample.

Well: the phenomena of breakage and layer rise are avoided;

not good: the phenomena of breakage and delamination appear.

6. The service life is as follows: the power is continuously supplied to work under 1.3 times of rated voltage.

Table 1 results of performance testing

Moisture resistance

Tension force

Mechanical strength

Flame retardant (second or S)

Low temperature resistance

Working life (h)

Example 1

Good taste

Not good

85

Not good

5104

Example 2

Good taste

Not good

89

Good taste

5116

Example 3

Good taste

106

Good taste

5316

Example 4

Good taste

118

Good taste

5428

Example 5

Good taste

137

Good taste

5689

Example 6

Good taste

145

Good taste

5702

Example 7

Good taste

154

Good taste

5888

Example 8

Good taste

156

Good taste

5793

Example 9

Good taste

160

Good taste

5698

Example 10

Good taste

171

Good taste

5895

Example 11

Good taste

182

Good taste

5964

Example 12

Good taste

Is excellent in

234

Good taste

6306

Comparative example 1

Good taste

Not good

83

Not good

5067

Comparative example 2

Good taste

Not good

87

Not good

5102

Comparative example 3

Not good

76

Not good

5003

From the test results, it can be seen that compared with phosphate surfactant modified argil powder, betaine surfactant modified argil powder and unmodified argil powder, the modified argil powder provided by the invention greatly enhances the mechanical strength, tensile force, flame retardance, moisture resistance, low temperature resistance and other properties of the wooden multilayer glued electric heating plate.

The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.

Claims

1. A wooden multilayer glued electric heating plate is characterized in that a wooden veneer layer, a first gluing layer, a coating layer, a conductive substrate layer, a coating layer, a second gluing layer and a wooden veneer layer are sequentially arranged on the wooden multilayer glued electric heating plate from bottom to top, wherein the conductive substrate layer comprises conductive copper slurry and carbon crystal slurry, and is connected with a temperature sensor and a full-automatic temperature regulator through a power line; the first cementing layer is a water-based adhesive composition, and the thickness of the first cementing layer is 7-12 mm; the second cementing layer is a water-based adhesive composition, and the thickness of the second cementing layer is 5-10 mm;

the coating layer is a water-based flame-retardant coating composition;

the aqueous flame retardant coating composition comprises:

20-30 parts of modified argil powder

10-20 parts of animal skin glue

50-65 parts of water;

2. the wooden multi-layer glued electric heating panel according to claim 1, characterized in that said aqueous adhesive composition comprises, in parts by weight:

wherein the attapulgite clay powder is obtained by acidifying, blending, airing and grinding 10-20 parts by weight of attapulgite clay and 10-15 parts by weight of clay powder, and M in the [ M (C5H4NCOO)2 ]. 4H2O is one or more of Ni, Cu and Fe.

3. A method for manufacturing a wooden glued multi-layer electric heating plate according to claim 1, characterised in that it comprises the following steps:

(3) welding a power line on the conductive substrate layer in the step (2);

4. The method for preparing a wooden multi-layer glued electric heating plate as claimed in claim 3, wherein the grain size of the carbon crystals in the carbon crystal slurry in the step (2) is 1000-3000 mesh.

5. The wooden multi-layered glued electric heating panel according to claim 1, wherein said wooden multi-layered glued electric heating panel is applied to carbon crystal heating wall panels, carbon crystal heating floors, and carbon crystal heating table tops.