250results about How to "Fully volatile" patented technology

The invention discloses a portable microsize distilling inhalator and controlling method, which comprises the following parts: case, volatile element group in the case with sucker, heating element, heating chamber between the sucker and heating element, control device to control the operation of the heating element. The controlling method comprises the following steps: designing the temperature of heating chamber higher than the preset temperature; locking the heating chamber lid on the sealing position of the case; stopping the operation of heating element when the heating chamber reaches the first preset temperature or when the heating element reaches the second preset temperature. The invention has smart appearance to carry and use conveniently, which improves the security and reliability effectively.

The invention discloses an electric heating film which comprises an adhesive agent and mixed powder mixed together as well as glass fiber cloth for bearing the adhesive agent and the mixed powder. The electric heating film is characterized by comprising the following components in parts by weight: 100 parts of polyimide resin as the adhesive agent, 4-30 parts of the mixed powder and 0-2 parts of stabilizer, wherein the mixed powder comprises conductive carbon black and graphite powder, and the weight ratio of the graphite powder to the conductive carbon black is 1: (0.8-1.25). A preparation method of the electric heating film comprises the following steps of: firstly, mixing the conductive carbon black with the graphite powder according to the weight ratio of 1: (0.8-1.25) to obtain the mixed powder, mixing the polyimide resin with the mixed powder according to the weight ratio of 1: (0.04-0.30), and adding a thinning agent for diluting; secondly, grinding for 10-60 minutes by using a grinding machine to obtain a colloidal mixture; and thirdly, coating the colloidal mixture on the glass fiber cloth by using a coating machine, roasting the colloidal mixture so that the colloidal mixture is immersed in and cured on the glass fiber cloth to form the electric heating film. The invention is mainly used for manufacturing the electric heating film.

The invention relates to a film for suction plastic packaging of medical equipment and a method for preparing the same. The film adopts a five-layer structure; the first layer is a heat seal layer A, of which the component is co-mixing resin of linear low-density polyethylene and metallocene catalytic polyethylene taking octene as a comonomer, wherein the content of the metallocene catalytic polyethylene in the co-mixing resin is 20 to 40 weight percent; the second layer is an inner layer B, of which the component is linear low-density polyethylene containing a hexene comonomer; the third layer is a core layer, of which the component is linear low-density polyethylene containing a butene comonomer; the fourth layer is a bonding layer D, of which the component is maleic anhydride grafted polyethylene; and the fifth layer is a weathering resistant layer E, of which the component is nylon 6 or 66. The preparation method comprises the following steps that: the bottom blowing water cooling type co-extrusion process or flow casting method is adopted, and the plastics is subjected to fusion and die inflation or flow casting, and quick cooling at water temperature of between 15 and 18 DEG C. The film and the preparation method have the advantages that: the method is simple; the products have merits of various resins; the film can be thermally sealed with the dialyzing paper without glum spreading; and moreover, the method and the film also have the advantages of low film thickness, good comprehensive property and reutilization.

The invention discloses a traditional Chinese medicine crushing machine. The traditional Chinese medicine crushing machine comprises a traditional Chinese medicine crushing machine body, wherein the traditional Chinese medicine crushing machine body comprises a traditional Chinese medicine crushing device; a traditional Chinese medicine drying device is fixedly connected to the bottom of the traditional Chinese medicine crushing device; a traditional Chinese medicine charge pipe is fixedly communicated to the top of the traditional Chinese medicine crushing device; an inner shell is arranged in the traditional Chinese medicine crushing device; a traditional Chinese medicine crushing chamber is formed in the inner shell; the bottom of the traditional Chinese medicine charge pipe penetrates through the inner shell and communicates with the traditional Chinese medicine crushing chamber; and a motor protection cover is fixedly connected to the top of the traditional Chinese medicine crushing device. According to the traditional Chinese medicine crushing machine disclosed by the invention, traditional Chinese medicines in the traditional Chinese medicine crushing chamber are filtered through a filter plate, so that the crushing efficiency of the medicines is increased, only the crushed medicines can pass through the filter plate, the crushing force of the medicines is increased, uniform crushing for the traditional Chinese medicines is achieved, the crushing effect of the medicines is improved, the advantage of fine crushing is achieved, and then the problem of influence on a medicine manufacturing process due to the poor crushing effect of an existing traditional Chinese medicine crushing machine is effectively solved.

A graphene ink includes a dispersion solution with a surface tension between 35 and 55 mJ / m2, a polymer binder dissolved in the dispersion solution to form a colloidal solution, and a plurality of graphene sheets dispersed in the colloidal solution with a suspension concentration of 0.1˜5 wt %. The graphene ink has a viscosity less than 100 cp and a surface potential greater than 30 mV or less than −30 mV. The graphene ink is first prepared and then processed by the steps of masking, spraying, solidifying and removing so as to form a graphene pattern by patterning the graphene ink on an electrical insulation substrate.

The invention discloses a heat-not-burn cigarette and its assembly. The heat-not-burn cigarette comprises a tobacco section (1), a cooling section (2), a filtering section (3), a first wrapping paper(5), a tipping paper (6) and a second wrapping paper (7). The end of the tobacco section (1) is connected with the front end of the cooling section (2), and the end of the cooling section (2) is connected with the front end of the filtering section (3). The first wrapping paper (5) wraps the tobacco section (1) to form cigarettes; the second wrapping paper (7) wraps the cooling section (2) and thefiltering section (3) to form an integrated filter rod. The tipping paper (6) rolls the cigarette and the integrated filter rod together. The cooling section (2) is a hollow filter rod, and the filtering section (3) is a solid filter rod that is made of polylactic acid fiber. The assembly includes the heat-not-burn cigarette and a low temperature heating cigarette set. The heat-not-burn cigaretteis applicable to electric heating, which has a sufficient filtering effect. The inlet temperature is reduced while reducing the inhalation of cigarette harmful substances and the taste of the cigarette is maintained as well.

The invention relates to an iron-manganese desulfurizing agent. The desulfurizing agent consists of 10 to 85 weight percent of iron oxide, 10 to 85 weight percent of manganese oxide and 5 to 20 weight percent of inorganic adhesive. The invention further discloses a preparation method for the iron-manganese desulfurizing agent. The iron-manganese desulfurizing agent is prepared by extruding and molding with a dry method and roasting at a specific temperature. The iron-manganese desulfurizing agent prepared by using the preparation method has optimal desulfurizing effect and high penetrating sulfur capacity. The test shows that the penetrating sulfur capacity of the desulfurizing agent can reach 25.1 percent. Moreover, the desulfurizing agent has high mechanical strength, can be widely applied in a chemical refining and desulfurizing process, and can be prevented from being broken to cause loss and affect the desulfurizing effect; and the test shows that the mechanical strength of the iron-manganese desulfurizing agent can reach 100N / cm.

The invention relates to a high temperature resistance film for blister package of medical sterilization equipment and a preparation method thereof. The first layer of the film is a heat-sealing layer A, and comprises blending resin of block copolymerized polypropylene and metallocene catalyzed polypropylene (mPP), wherein, the melting point of the block copolymerized polypropylene is more than 131 DEG C; the dosage of the mPP accounts for 20 to 50 percent of the blending rein by weight; the second layer of the film is a secondary inner layer B, and comprises homopolymerized polypropylene; the third layer of the film is an intermediate layer C, and comprises homopolymerized polypropylene; the fourth layer of the film is a binding layer D, and comprises polypropylene grafted by maleic anhydride; and the fifth layer is a weather resistance layer E, and comprises nylon 6 or 66. The film is prepared by adopting a bottom blowing water cooling type co-extrusion process or a casting method, wherein, after plastic is sufficiently melted, is inflated or cast by a die, the plastic is cooled at water temperature of between 15 and 18 DEG C. The preparation method is simple, and the product can endure high temperature steam sterilization for long time, and has good heat-sealing performance of dialyzing paper.

Edible fungus antistaling method and apparatus are disclosed. The method includes dehumidifying fresh edible fungus with circulating wind inside a sealed vacuum processing chamber to reach set temperature and water content, and fast vacuum freezing to further eliminate water of edible fungus. The said method can maintain the metabolism of edible fungus and reach required temperature and water content of edible fungus without contamination and damage to look of edible fungus. The method and apparatus has low power consumption, results in homogeneous temperature and water content inside and outside the edible fungus, controls water content in edible fungus in 70-88 % and makes edible fungus capable of being preserved and transported at low temperature for long period.

The invention discloses a microwave heating device for an electronic cigarette. The microwave heating device comprises a base, a microwave generator and a microwave incident cavity, a heating cavity is formed in the base, a microwave transmission sheet is arranged between the heating cavity and the microwave incident cavity and is fixedly connected to the top end of the microwave incident cavity,a microwave emitting port is formed in the microwave incident cavity, the bottom of the microwave emitting port is fixedly connected to the microwave generator, and a battery module is arranged at thebottom of the microwave generator. The microwave heating device has the beneficial effects that the microwave generator is arranged, so that tobacco or tobacco tar is integrally heated, tobacco substances of the tobacco tar or the tobacco is more fully volatilized, and the flavor is improved.

The present invention relates to deep agricultural product processing and functional food. The preparation process of selenium-enriched deodorized superfine garlic powder includes the steps of: slicing garlic, constant temperature soaking in selenium solution to reach selenium content of 0.5-0.8 microgram / g, vacuum freeze drying to water content below 2% to reach selenium content of 3.6-5.8 microgram / g, three-stage crushing to average size below 10 micron, and final oxygen eliminating packing. The said process can maintain the active components in garlic, eliminate the bad smell of garlic, and make the garlic powder easy to be absorbed by human body.

The invention discloses a preparation method of dried shitake mushroom. The preparation method comprises the following steps: fresh shitake mushrooms are picked, the mushroom stems are cut off, the moisture in the surface of the shitake mushrooms is removed, and pretreated shitake mushrooms are obtained; color fixing solution is uniformly sprayed on the surfaces of the pretreated shitake mushrooms, so color-fixed shitake mushrooms are obtained; the color fixing solution for the shitake mushrooms is the water solution containing calcium chloride, citric acid, tea polyphenol and L-cysteine; and then the color-fixed shitake mushrooms are dried, so that dried shitake mushrooms are obtained. By adopting the method disclosed by the invention to prepare dried shitake mushrooms, the browning of the shitake mushrooms is effectively prevented, and the prepared shitake mushrooms are good in luster, so that the preparation method is applicable to the processing of the dried shitake mushrooms.

The invention relates to a square spinning channel with 48 joints, which comprises a square tube shaped spinning channel body (1), an upper side air inletting cabinet (2), a spinning component with 48 joints (3) and an upper side air returning cabinet (4), wherein the 48-joint spinning component (3) is mounted on the top of the square tube shaped spinning channel body (1), the upper side air inletting cabinet (2) and the upper side air returning cabinet are respectively mounted on the left side and the right side of the top of the square tube shaped spinning channel body (1). The square spinning channel with 48 joints is characterized in that a lower air returning device (5) and a lower nitrogen gas air curtain device (6) are mounted on the lower portion of the square tube shaped spinning channel body (1), wherein the lower air returning device (5) and the lower nitrogen gas air curtain device (6) are mounted up and down in interval, the square spinning channel with 48 joints can greatly improve the output of the spinning under the precondition of slightly increasing the number of the spinning channel and winder device and the like.

The invention discloses a coaxial heating chamber and an electronic cigarette device with the coaxial heating chamber. The electronic cigarette device with the coaxial heating chamber includes a coaxial heating chamber which is formed by the fact that an outer conductor chamber is regarded as a chamber, and an inner conductor column which is regarded as a column and inserts from one end of the outer conductor chamber into the outer conductor chamber; and a microwave source from one end of the inner conductor column inserted into the outer conductor chamber into the coaxial heating chamber to conduct microwave transmission to achieve the heating of microwave to a tobacco. A coaxial transmitter and the coaxial heating chamber are used, microwaves with the frequency of 915MHz and 2.45GHz canbe transmitted in the coaxial transmitter and the coaxial heating chamber, and therefore, a relatively mature solid-state microwave device can be used, especially 915MHz electrical conversion efficiency is higher; the size of the device can be effectively controlled; and due to the fact that the microwave has no temperature, through high frequency alternating electric field, polar molecules in thetobacco is made directly to move and heat, tobacco overall temperature is controlled in 200~300 DEG C, local high temperature does not exist, higher temperature does not exist in the overall coaxialheating chamber and the tobacco, cracking does not occur, and aldehyde or other harmful substances cannot be produced.

A hard alloy / steel compound roll and a preparation method thereof relate to a compound roll and a preparation method thereof, which solve the problems of the complex preparation process of the existing compound roll, the small torsion shear force resistance of products, and only being fit for operation in a low temperature environment. The hard alloy / steel compound roll is made from hard alloy outer ring, steel inner ring and preset solder. The preparation method comprises the following steps: 1. a base metal to be welded is cleaned; 2. solder powder is prepared; 3. binder is prepared; 4. the solder powder and the binder are evenly mixed and added to a welding seam; 5. the compound roll is obtained by welding an object to be welded which is added with the preset solder by the vacuum brazing method. The invention has the advantages of simple method, low production cost, short production period, and the product has the advantages of good antioxidation, adaptability to high-temperature environment work, high torsion shear force resistance which is up to 190-230MPa, good wear resistance and small residual stress.

The invention discloses an electric kettle with an automatically opening and closing lid based on rate of water temperature change, comprising a kettle body, an automatically opening and closing lid mechanism, a single chip microcomputer, an electronic switch, a power supply and a temperature sensor. The kettle body comprises a lid and a heating resistor. The single chip microcomputer comprises a temperature acquisition module, a boiling judging module and a control module. Boiling state of the water in the kettle is judged by the boiling judging module based on the rate of water temperature change. If the water is judged as in the boiling state by the boiling judging module, the lid will be opened by the automatically opening and closing lid mechanism controlled by the control module. After a preset period of time, the electronic switch is turned off and the lid is closed by the automatically opening and closing lid mechanism controlled by the control module. The invention proposes an effective method to judge the boiling state of water in an electric kettle. And by use of the automatically opening and closing lid mechanism, the lid is opened automatically after boiling and the water is kept heated for a preset period of time and then the lid is closed automatically. In this way, hazardous substance in water is fully volatilized and water quality is improved.

The invention relates to the technical field of packaging bag processing, and discloses a production and processing technology of a paper-plastic packaging bag. The production and processing technology needs to use a compounding device, and comprises the following steps that (1) material preparation is performed; (2) blow molding is performed, wherein plastic raw materials are added into a blow molding machine for blow molding to prepare a thin film, namely, a plastic layer; (3) printing is performed; (4) compounding is performed, wherein the plastic layer obtained after printing is compounded on raw-material paper through the compounding device, an adhesive of a glue coating roller is scraped through a scraper, the glue coating roller is used for perform glue coating on the raw-materialpaper, and then the plastic layer is pressed on the raw-material paper through a hot pressing roller for compounding to obtain a composite paper-plastic layer; (5) bag making is performed, wherein thecomposite paper-plastic layer firstly undergoes heat-seal edge sealing treatment, and then cold pressing shaping is performed on the sealed edge; and (6) slitting is performed, wherein the compositepaper-plastic layer is cut along the sealed edge to obtain the single paper-plastic packaging bag. According to the production and processing technology, the problem that in the prior art, glue coating is not uniform, and long-term use is performed, so that the adhesive becomes hard, and then the compounding effect is relatively poor can be solved.

The invention relates to a water-based organic ceramic sprayed aluminum veneer and a manufacturing method thereof, and belongs to the technical field of curtain wall decorative boards. The water-based organic ceramic sprayed aluminum veneer comprises a passivation layer I, an aluminum baseplate, a passivation layer II, a bottom paint layer and a surface paint layer in sequence from top to bottom, wherein the bottom surface and the surface of the aluminum baseplate are conducted by passivation processing to obtain the passivation layer I and the passivation layer II respectively; the bottom paint layer is formed by spraying a water-based organic ceramic material for 15-20 <Mu>m on the passivation layer II; the surface paint layer is formed by spraying the water-based organic ceramic material for 20-30 Mum on the bottom paint layer. The sprayed aluminum veneer has the advantages that the aluminum veneer is controllable in range of glossiness, high in intensity and hardness, scratch resistant, acidproof, highly flame-retardant, and aging-resistant, provided with self-cleaning performance, and large in color choosing space.

The invention discloses a hot-setting backing welding flux and a preparation method thereof, and belongs to the field of welding materials for union melt welding. The flux comprises the following components by mass percentage: 18% of aluminum oxide, 22% of magnesite, 5% of natural wollastonite, 9% of fluorite, 2% of silicon mud, 3% of zircon sand, 30% of reduced iron powder, 2% rutile, 3% of ferromanganese, 3% of silicon iron and 3% of ferro-aluminium. The welding flux is spread on the surface of a copper plate uniformly before welding; when the front is welded, the back of a root molten pool and the welding flux conduct partial metallurgical reaction, and the welding flux is heated and solidified to become a backing to assist in back welded joint forming simultaneously; the welding flux takes MgO, CaO, SiO2, TiO2, CaF2 and Al2O3 as basic slagging substances; and the welded joint quality is good. According to the preparation method, a hot-setting agent is added by a special fabrication mode, so that the welding flux forms solid blocks at 200-300 DEG C, no air hole is formed in the welded joint, and the welded joint quality is high.

The invention discloses a high-performance low-temperature soldering lead-free solder paste and a preparation method thereof. The soldering lead-free solder paste comprises, by weight, 0.2-2.5% of a combined surfactant, 0.1-1.0% of an antifoaming agent, 0.01-0.1% of an active strengthening agent, 0.1-1.0% of a normal-temperature activity inhibitor, 0.5-1.5% of a thixotropic agent, 2.5-6.0% of a cosolvent, 2.7-5.9% of a resin film-forming agent, and the balance Sn-based solder alloyed powder; and the combined surfactant is formed by mixing liquid saturated monocarboxylic acid and solid unsaturated low-boiling-point acid according to the weight ratio of 1:2-1:9. The high-performance low-temperature soldering lead-free solder paste and the preparation method thereof can solve the common problems of a large quantity of black residues and solder balls and the like of current low-temperature soldering lead-free solder pastes after welding, meanwhile, the paste has the characteristics of being good in storage stability and not dried in the long-time printing process, and the high-performance low-temperature soldering lead-free solder paste is particularly suitable for the field of assembly of low temperature electronic surfaces.

The invention discloses an acoustic surface wave accelerated headspace single-drop microextraction device and an acoustic surface wave accelerated headspace single-drop microextraction method. The microextraction device comprises a piezoelectric substrate, a microsyringe used for suspending an organic extraction agent liquid drop, a cover body and a signal generation device used for generating an RF (radio frequency) electrical signal, wherein the upper surface of the piezoelectric substrate is a working surface; the working surface is provided with interdigital transducers and a hydrophobic layer used for placing an extraction liquid sample liquid drop; the extraction liquid sample liquid drop is positioned on a sound transmission path of an acoustic surface wave excited by the interdigital transducers; the opening end of the cover body is inversely buckled on the hydrophobic layer; the extraction liquid sample liquid drop is positioned in the cover body; a needle point of the microsyringe penetrates through the bottom of the cover body and extends into the cover body; and the distance between the organic extraction agent liquid drop and the extraction liquid sample liquid drop is 0.5-1 centimeters. By utilizing the acoustic surface wave accelerated headspace single-drop microextraction device and the acoustic surface wave accelerated headspace single-drop microextraction method, movement of the extraction liquid sample liquid drop is driven by utilizing the acoustic surface wave excited by the interdigital transducers so that the extraction speed is increased, and extractants in the extraction liquid sample liquid drop are sufficiently volatilized so that the extraction degree is improved.

The invention relates to ultra-gasoline resistant aqueous varnish and a preparation method thereof. The aqueous varnish comprises a component A resin paint and a component B curing agent in a weight ratio of 3: 1, wherein the component A resin paint comprises 45-65 parts of aqueous hydroxyl acrylic emulsions, 15-30 parts of aqueous hydroxyl polyurethane dispersions, 0.2-0.5 part of a defoaming agent, 0.2-1.0 part of a wetting leveling agent, 0.2-0.6 part of an aqueous drier, 0.1-0.3 part of a bactericide, 1-3 parts of light stabilizers and 5-15 parts of solvents A; and the component B curing agent comprises 55-75 parts of curing agents and 10-30 parts of solvents B. Compared with the prior art, the preparation method is simple, raw materials are widely selected, and the prepared aqueous varnish has excellent chemical resistance, especially gasoline resistance, effectively improves surface drying speed and activation period, has good interlayer adhesion, and has the advantages of fast hardness establishment, high fullness and the like.

The invention relates to a water-based elastic paint with high drying speed and long activating period and a preparation method thereof. The elastic paint is prepared from a component A resin paint and a component B curing agent at mass ratio of 2:1, wherein the component A resin paint comprises 10-30 parts of waterborne polyurethane dispersoid, 30-50 parts of waterborne acrylic emulsion, 1-5 parts of anti-settling agent, 0.2-0.5 part of de-foaming agent, 0.2-1.0 part of wetting flatting agent, 0.2-0.6 part of water-based drier, 0.2-0.5 part of pH regulator additive, 5-10 parts of extinction powder and 10-30 parts of a solvent A and the component B curing agent comprises 55-70 parts of a curing agent and 15-35 parts of a solvent B. Compared with the prior art, the paint has the advantagesthat the preparation method is simple, the raw material source is wide and the prepared elastic varnish surface has excellent touch feel, high drying speed, long activating period, high transparency,high interlayer adhesion, high hardness and excellent anti-scratching property.

The invention brings forward a preparation method of a polyethylene microporous membrane and a system thereof. The preparation system of the polyethylene microporous membrane comprises a stirring device, an extrusion device, a cooling molding device, a bidirectional stretching device, an extraction device, a breadthwise stretching and a heat treatment device, wherein the stirring device, the extrusion device, the cooling molding device, the bidirectional stretching device, the extraction device, the breadthwise stretching device and the heat treatment device are connected in order. The preparation method provided by the invention can be adopted to produce an ultrathin polyethylene microporous membrane of 6 micrometers thickness and has advantages of high temperature resistance, corrosion resistance, good stability and long service life.

The invention discloses a production method of an odorless high-nitrogen livestock and poultry manure fermented organic fertilizer. The production method comprises the following steps: step 1, uniformly mixing animal manure with crushed straw or stalks of other crops according to a weight ratio of (2-8):1, adding water after uniform mixing, and controlling the water content to be 60-65% to obtaina fermented material; and step 2, adding a prepared microbial agent solution, zeolite powder and calcium chloride respectively according to mass percentages of 2.5%, 3% and 4%.

The invention discloses a multi-layer composite packaging bag and a processing technology thereof. The multi-layer composite packaging bag comprises a bag body, wherein the bag body is divided into five layers which are mutually attached to each other, the innermost layer is an anti-tear layer, the tear-resistant layer is a nylon fiber layer, the thickness of the nylon fiber layer is 3 mm, the nylon fiber layer is composed of warp nylon fibers and weft nylon fibers, every three warp nylon fibers are twisted with one another, every three weft nylon fibers are twisted with one another, the two outer layers are flame retardant layers, and the two intermediate layers are heat insulation layers. According to the multi-layer composite packaging bag, the nylon fiber layer, the flame retardant layers and the heat insulation layers are arranged, the multi-layer composite packaging bag has good tear resistance and high temperature resistance.

The invention relates to the technical field of thermal barrier coating layers and specifically discloses three-rare-earth niobate ceramic. The ceramic is prepared by sintering La2O3 powder, Gd2O3 powder, Ho2O3 powder and Nb2O5 powder; a chemical general formula of the ceramic is (La1-x-yGdxHoy)3NbO7; when x+y is smaller than or equal to 5 / 6, a crystal structure of the ceramic is an orthorhombic phase; when x+y is larger than 5 / 6, the ceramic is a cubic phase; the compactness of the ceramic is larger than 98%. The preparation method of the ceramic comprises the steps: weighing the La2O3 powder, the Gd2O3 powder, the Ho2O3 powder and the Nb2O5 powder according to the molar ratio of La to Gd to Ho to Nb as 3(1-x-y) to 3x to 3y to 1, adding a solvent, mixing and grinding to obtain powder A; drying the powder A and primarily sieving to obtain powder B; putting the powder B into a mould, compressing, presintering to obtain a block C, grinding after the block C is cooled and then secondarilysieving to obtain powder D; sintering the powder D to obtain the three-rare-earth niobate ceramic. The three-rare-earth niobate ceramic disclosed by the technical scheme of the invention has the advantages of high compactness, low thermal conductivity under high temperature and high thermal expansion coefficient.

The invention belongs to the field of melamine products, and in particular relates to an amino molding compound powder for processing melamine tableware and a preparation method thereof, which is made of the following raw materials in weight percentage: sodium citrate 15%-25%; titanium White powder 2%‑4%; amino molding compound granules 45%‑55%; wood fiber 18%‑28%; zinc stearate 15%‑25%. The preparation method is batching, material kneading, material drying and crushing and ball milling. During the material kneading process, the prepared materials are fully mixed and stirred by the paddles that cooperate with each other and rotate forward and backward in the kneader, and at the same time, use the steam of the kneader to heat The device heats the material with steam, so that the moisture in the material can be quickly and fully volatilized. The material ratio of the invention is scientific and reasonable, and the melamine product produced has good quality and tightness, superior scratch resistance, simple and fast operation, complete water volatilization during the kneading process, shortens production time, improves work efficiency, and enhances product quality.

The invention belongs to the technical field of copper-clad plates and particularly relates to a preparation method of a copper-clad plate with two flexible surfaces. The preparation method comprises the following steps of preparing an adhesive; smearing the adhesive on one surface of a flexible insulated base film, then baking the adhesive by adopting a segmented temperature control method, then compositing the dried adhesive and a copper foil in a rolling manner; smearing the adhesive on the other surface of the flexible insulated base film, then baking the adhesive by adopting a segmented temperature control method, then compositing the dried adhesive and the other copper foil so as to obtain the copper clad plate with two flexible surfaces. Compared with the prior art, the copper-clad plate and the preparation method have the advantages that by segmented temperature control, the temperature is firstly increased to be higher than the volatilization temperature of a solvent slowly, so that the solvent can be fully volatilized; then the temperature is slowly increased to be more than the reaction temperature of epoxy resin, so that the linear epoxy resin is completely cured into a shaped high-molecular compound, further the curing of the adhesive is safe, the occurrence of the phenomenon of plate adhesion after a circuit is printed can be reduced and the quality of the product is improved.