758 results about "Resin composite" patented technology

The invention belongs to the technical field of gel materials, and particularly relates to aerogel powder for polyolefin modification and a preparation method and application thereof. The preparation method of the aerogel powder comprises the following steps: (1) preparing aramid nanofiber dispersion liquid; (2) preparing a polypyrrole coated aramid nanofiber dispersion liquid; (3) mixing polyamide acid and the polypyrrole coated aramid nanofiber dispersion liquid, and then carrying out partial imidization and solvent exchange to prepare hydrogel; and (4) carrying out freeze drying, thermal imidization and crushing to obtain the aerogel powder for polyolefin modification. The aerogel powder is a porous solid material formed by forming one-dimensional composite fibers from aramid nanofibers and polypyrrole and combining the one-dimensional composite fibers with polyimide resin. The aerogel powder and polyolefin resin are compounded to obtain the polyolefin resin composite material with high strength and antistatic property, and the polyolefin resin composite material can be widely applied to the fields of pipes, plates, grouting equipment parts, grouting bags and the like.

The invention belongs to the technical field of fiber materials, and particularly relates to a modified aramid nanofiber as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing an aramid nanofiber dispersion liquid; (2) modifying the aramid nanofiber by using POSS; and (3) carrying out in-situ polymerization on polypyrrole on the surface of the aramid nanofiber. POSS (polyhedral oligomeric silsesquioxane) has a relatively large volume exclusion effect, the template effect of long-chain alkyl quaternary ammonium salt can be influenced by scattered adhesion of POSS on the surface of aramid nanofiber, uneven polymerization of pyrrole monomers is caused, and formation of a rough structure on the surface of the fiber is facilitated. According to the invention, the polypyrrole-coated aramid nanofiber with a coarse structure is used as a polyolefin modified material, so that the problem of low interfacial force existing in a common filler is solved, and the polyolefin resin composite material with high strength and antistatic property is obtained and can be widely applied to the fields of pipes, plates, grouting equipment parts, grouting bags and the like.

The invention relates to the technical field of polyurethane pultrusion, in particular to a preparation method of a polyurethane pultrusion resin composite material, which comprises the following steps: drawing glass fiber into a glue dipping tank filled with polyurethane resin for dipping; heating the impregnated glass fiber in a pre-forming mold to obtain a pre-cured gel forming body; when it is judged that preparation of the pre-cured gel forming body does not meet the preset standard according to the scattering intensity standard deviation of the pre-cured gel forming body, preparation parameters are adjusted; the pre-cured gel forming body meeting the preset standard is put into a pultrusion mold for pultrusion, and a cured forming body is obtained; when it is judged that the preparation of the cured molded body does not meet a preset standard according to the average ripple amplitude, determining an adjustment strategy for the preparation of the cured molded body to do not meet the standard according to the curvature variance of the surface lines; and pulling and naturally cooling the cured molded body meeting the preset standard to obtain the polyurethane resin composite material. The preparation efficiency of the resin composite material is improved.

The invention discloses a silicon nitride ceramic-based composite material and a preparation method thereof, and relates to the technical field of silicon nitride ceramics. The silicon nitride ceramic-based composite material is prepared from silicon dioxide coated modified boron nitride and resin composite phase change microcapsules, Si3N4-C coated Al2O3 core-shell fiber aerogel, nano yttrium oxide and polyvinyl butyral, the silicon dioxide coated modified boron nitride and resin composite phase change microcapsules are stably attached to the surface of the Si3N4-C coated Al2O3 core-shell fiber aerogel in a chemical bonding and mechanical interlocking mode, the interface bonding strength is enhanced, the risk of phase separation is reduced, the combination effect of the silicon dioxide coated modified boron nitride and resin composite phase change microcapsules and the Si3N4-C coated Al2O3 core-shell fiber aerogel is better exerted, and the composite phase change effect of the silicon dioxide coated modified boron nitride and resin composite phase change microcapsules is improved. According to the present invention, the fracture toughness can be improved through fiber toughening, aerogel pore and microcapsule stress dispersion, the high temperature resistance can be improved through the low thermal conductivity of the aerogel and the heat absorption effect of the microcapsule, the mechanical property of the silicon nitride can be significantly improved through multiple ways and multiple modes, and the high temperature resistance can be effectively enhanced.

The invention discloses an in-situ biomineralizable mineral-PHA water-based seed coating based on microphase separation and soil water potential response and a preparation method and application thereof, and belongs to the technical field of green coatings, the in-situ biomineralizable mineral-PHA water-based seed coating comprises a structural mineral skeleton, a PHA and resin composite matrix and a pore-forming disintegrating agent. According to the invention, a resin enrichment layer and island microphase structure is innovatively constructed, and the contradiction between poor wear resistance and difficult disintegration of a bio-based material is effectively solved. Compared with the prior art, the wear-resistant and dust-reducing coating has the advantages that the wear-resistant and dust-reducing performance far better than that of the traditional PHA coating is realized by utilizing an interface enhancement effect under the condition of equal or even lower polymer dosage; meanwhile, the coating is endowed with a sensitive soil water potential response'switch ', so that dry-state tough seed protection and wet-state rapid disintegration are ensured, and germination is not hindered. Organic components of the composition can be biodegraded in aerobic soil, inorganic components are natural minerals, the environmental compatibility is good, the composition has the advantages of high performance and low cost, and an excellent seed treatment scheme is provided for green agriculture.

The invention discloses a cement-based surface super-hydrophobic coating as well as a preparation method and a use method thereof. The cement-based surface super-hydrophobic coating comprises a prime coating and a surface coating, the prime coating is a coupling agent modified fibrous clay / resin composite material, the surface coating is a coupling agent modified SiO2 / low surface energy substance modified resin composite material, the contact angle of the cement-based surface super-hydrophobic coating is 155-159 degrees, and the impact strength is 50-60 kg.cm. Fibrous clay and high-permeability alkali-resistant resin are mixed to serve as a bottom layer of the coating, silane modified SiO2 and a low-surface-energy substance modified resin material are compounded to serve as a surface layer, the surface layer is coated on the surface of a cement-based material, and a nanofiber structure of clay is combined with the high-permeability alkali-resistant resin, so that the coating is endowed with excellent toughness, adhesive force and alkali resistance; and the coating is endowed with super-hydrophobicity and wear resistance by virtue of a bulge structure formed by bonding dense SiO2 on the surface through resin.

The invention discloses resin composite liquid with dual self-repairing and high ethanol solvent wiping resistance as well as a preparation method and application of the resin composite liquid, and belongs to the technical field of polyurethane emulsion coatings. Aiming at the problems that an existing waterborne polyurethane coating is poor in ethanol resistance due to residual carboxyl / hydroxyl of a hydrophilic chain extender and the self-repairing efficiency of a single dynamic bond is low, a metal ion buffer solution is added into a hydroxyl-terminated polyurethane emulsion to coordinate with the carboxyl of the hydrophilic chain extender, so that a hydrophilic group is closed, and the crosslinking density is increased; meanwhile, a boric acid compound is introduced to form dynamic boric acid ester bonds with residual hydroxyl groups of the system, and hydrophilic groups in the system are consumed while a dual self-repairing network is constructed. The coating prepared by the invention has good self-repairing and ethanol wiping resistance.

The invention relates to the field of optical display and material engineering, in particular to a silica gel integrated optical film with a 3D light splitting function and a manufacturing method of the silica gel integrated optical film. A silica gel integrated optical film with a 3D light splitting function comprises a transparent optical base material and a microstructure layer, and the microstructure layer is combined on the surface of the transparent optical base material in an integrated forming mode. And the microstructure layer is an anhydrous silica gel-resin composite material obtained by combining organic silica gel with low refractive index and resin with high refractive index through an anhydrous chemical reaction system. The optical film obtained in the invention has excellent interface bonding stability and long-term reliability, the overall thickness of the optical film is small, the optical loss is reduced, the light transmittance is higher, and the overall transmittance can reach 93% or above. And the manufacturing process integration degree and the mold repeated utilization rate are high, the industrial batch production requirement can be met, and the excellent industrial application prospect is achieved.

The invention relates to a low-dielectric-loss high-thermal-conductivity epoxy resin composite material and a preparation method thereof, and the preparation method comprises the following steps: carrying out surface modification treatment on a thermal conductive filler: carrying out surface modification on the thermal conductive filler by adopting a chemical covalent bonding or physical adsorption mode, the heat-conducting filler is used for improving the compatibility of the filler and an epoxy resin matrix and reducing the interface thermal resistance, and comprises boron nitride with a two-dimensional sheet structure; epoxy resin, a curing agent and an optional modifier are evenly mixed, the epoxy resin is selected from epoxy resin with the low polarity characteristic, and the modifier comprises at least one of thermoplastic resin or elastomer. And the process is simple and controllable.

The invention provides a polymer foam product, a preparation method thereof and a shoe material, and belongs to the technical field of 3D printing. The preparation method comprises the following steps: firstly, carrying out melt extrusion on a thermoplastic resin mixed material, and carrying out 3D printing on the obtained thermoplastic resin composite material according to a planned path to obtain a polymer workpiece; the preparation method comprises the following steps: firstly, soaking a polymer workpiece in a solvent, and finally, soaking the soaked polymer workpiece in supercritical fluid, and foaming to obtain a polymer foam product. By adopting the method provided by the invention to prepare the polymer foam product, the polymer foam product with low apparent density, low compression permanent deformation, high rebound resilience and high tensile strength can be obtained.

The invention discloses a low-temperature curable bismaleimide resin-based composite material surface film and a preparation method thereof, relates to the field of bismaleimide resin composite material surface films, and aims at solving the problem that the curing temperature of an existing bismaleimide resin composite material surface film is too high. The surface film is composed of bismaleimide resin, an allyl compound, thermoplastic resin, a catalyst and a fluidity control agent. The preparation method comprises the following steps: adding the allyl compound into a reaction kettle, heating and stirring, adding the thermoplastic resin, cooling, adding the bismaleimide resin, continuously heating and stirring, and carrying out double-roller hot rolling film forming on the bismaleimide resin and a carrier for manufacturing an adhesive film through an adhesive film machine to prepare the low-temperature curable bismaleimide resin surface film.

The application discloses a furan resin composite material added with graphene and a preparation method thereof, and belongs to the technical field of furan resin composite material preparation. The preparation method of the furan resin composite material added with graphene comprises the following steps: step one, furan resin is added into a container, a curing agent is added during stirring, and continuous stirring is carried out to obtain a premixed resin; step two, a modified toughening agent is slowly added into the premixed resin, heating and continuous stirring are carried out to obtain a toughening mixture; step three, modified graphene is added into ethanol, ultrasonic dispersion is carried out, the toughening mixture is slowly dripped, high-speed stirring is carried out to obtain a composite mixture, the composite mixture is subjected to vacuum degassing, and then is added into a mold, solidification is carried out to obtain the furan resin composite material added with graphene. The composite material prepared by the method has excellent heat conductivity, flame retardancy and toughness.

The invention belongs to the technical field of deep sea vibration and noise reduction functional shells, and particularly relates to a vibration and noise reduction composite pipe and a preparation method thereof.The vibration and noise reduction composite pipe comprises an outer layer, a middle layer and an inner layer which are sequentially connected together in a sleeved mode; the outer layer is a carbon fiber resin composite material pipe; the inner layer is a 316L stainless steel pipe; the middle layer is arranged between the outer layer and the inner layer and comprises a micro-perforated aluminum pipe, a Vonass flower basket imitating structure and a perforated aluminum pipe which are sequentially connected in a sleeved mode from outside to inside, and graphene epoxy resin is filled between the micro-perforated aluminum pipe and the Vonass flower basket imitating structure and between the Vonass flower basket imitating structure and the perforated aluminum pipe. According to the invention, through the application of the Vonass flower basket imitating structure and the micro-perforated aluminum pipe, the broadband sound absorption and noise reduction effect is obviously improved, the performance is excellent in the aspect of low-frequency noise absorption, and compared with a traditional honeycomb structure, the honeycomb structure has obvious advantages; the middle layer can absorb sound waves in the frequency range of 50-5000 Hz, and the low-frequency absorption efficiency is improved by 40%.

The invention discloses a heat-resistant high-strength phenolic resin composite material and a preparation method thereof. The heat-resistant high-strength phenolic resin composite material is prepared from cardanol modified phenolic resin and a fluorinated graphene nano material, a fluorine atom and a carbon atom in the fluorinated graphene are covalently bonded to form a C-F bond; the cardanol modified phenolic resin is prepared from the following raw materials: phenolic substances and formaldehyde; the phenolic substances comprise phenol and cardanol; when the total mass of the phenolic substances is 100%, the mass ratio of the cardanol is 5%-15%; the mass ratio of the fluorinated graphene is 0.1%-0.5% by taking the total mass of the phenolic substances as 100%. The preparation method of the heat-resistant high-strength phenolic resin composite material comprises the following steps: uniformly mixing ethanol dispersion liquid containing fluorinated graphene with cardanol modified phenolic resin by ultrasonic waves to obtain the heat-resistant high-strength phenolic resin composite material.

The invention relates to the technical field of resin composite materials, in particular to a layer-adding adhesive film for an FC-BGA packaging carrier plate, a preparation method of the layer-adding adhesive film and an adhesive-coated copper foil. The layer-adding adhesive film is prepared from the following raw materials in parts by mass: 50 to 60 parts of epoxy resin, 180 to 200 parts of inorganic filler, 30 to 36 parts of curing agent, 4 to 6 parts of modified phenoxy resin, 3 to 5 parts of carbodiimide resin and 0.2 to 0.4 part of 4-dimethylaminopyridine. Modified phenoxy resin and carbodiimide resin are added on the basis of main components such as epoxy resin, inorganic filler and a curing agent, meanwhile, 4-dimethylaminopyridine is used as a curing accelerator, and through the synergistic effect of all the components, the dielectric loss angle tangent of a layer-adding adhesive film can be effectively reduced, the glass-transition temperature of a layer-adding adhesive layer is increased, and the bonding strength of the layer-adding adhesive film is improved. Good flame retardance of the layer-adding adhesive film is ensured, and the layer-adding adhesive film is applied to the adhesive-coated copper foil.

The invention discloses a preparation method of a silicon dioxide-epoxy resin composite material, the acoustic impedance of the composite material is controlled by adjusting the volume fraction of the silicon dioxide-epoxy resin composite material, an ultrasonic transducer prepared by utilizing the composite material and a preparation process thereof, and an imaging system designed by utilizing the ultrasonic transducer. By designing the matching layer and the backing layer with specific acoustic impedance, seamless fusion of ultrasonic imaging and photoacoustic imaging is realized, the transducer has ultrahigh sensitivity, broadband characteristic and high optical transparency, shows bimodal imaging capability of high contrast and high resolution, and solves the problem that a traditional transparent ultrasonic transducer is insufficient in acoustic performance.

The invention discloses a laser cladding high-entropy alloy carbide ceramic coating and a preparation method thereof, and belongs to the technical field of high-entropy alloy coatings. A laser cladding technology is adopted, a matrix and high-entropy alloy-phenolic resin composite powder are subjected to in-situ melting through a high-energy laser beam, firm metallurgical bonding between the coating and the matrix is achieved, elements at an interface are in gradient transition, and the shear strength exceeds 100 MPa. The single-layer deposition thickness can reach more than 500 microns and can reach the centimeter level through multi-layer accumulation, so that the coating thickness capability is remarkably improved; the prepared coating is high in compactness, the porosity is lower than 5%, and the key technical contradiction that the thickness and the compactness cannot be synergistically optimized in traditional thermal spraying is effectively solved. Besides, the in-situ carbonization reaction under the methane atmosphere is innovatively adopted, the complex high-temperature synthesis process of traditional high-entropy carbide powder is avoided, the preparation cost is greatly reduced, the preparation period is greatly shortened, and the method has the remarkable advantages of being efficient, low in cost and high in performance.

The invention relates to an aperture-adjustable porous carbon material and a preparation method and application thereof. The preparation method comprises the following steps: adding an alkali solution into a phenol source, stirring, heating to 60-90 DEG C, adding an aldehyde source solution, stirring, cooling to room temperature, and adding an acid solution to adjust the mixed solution to be neutral, so as to obtain a phenolic resin oligomer solution; evaporating water, and adding low-carbon alcohol to prepare a phenolic aldehyde low-carbon alcohol solution; preparing silicon dioxide sol, wherein the particle size of silicon dioxide particles is controlled by adjusting the pH value; the preparation method comprises the following steps: mixing and stirring a phenolic low-carbon alcohol solution and silicon dioxide sol at 35-45 DEG C, washing, filtering and drying to obtain a silicon dioxide-phenolic resin composite carbon source; carrying out carbonization treatment on the silicon dioxide-phenolic resin composite carbon source to obtain a carbonized product with a carbon skeleton and an S O < 2 > template; and carrying out wet etching treatment on the carbonized product, selectively etching the S < O2 > template so as to form holes in positions occupied by S < O2 > particles, and then washing, filtering and drying to obtain the porous carbon material with the adjustable aperture.

Disclosed is a middle frame assembly, including a middle plate and a frame disposed around an outer edge of the middle plate, where the middle plate includes a first carbon fiber reinforced resin composite material base body and a first metal plating layer compounded on a surface of the base body. Some embodiments of this application further provide a preparation method for a middle frame assembly and an electronic device in the middle frame assembly. Some embodiments of this application use a carbon fiber reinforced resin composite material as a middle plate base body of the middle frame assembly.

The invention relates to the technical field of melamine resin high polymer materials, in particular to a high-heat-resistance melamine resin composite material which comprises a first component and a second component. The first component comprises a modified melamine resin prepolymer, a crosslinking accelerator, a curing agent and a first dispersing agent; the modified melamine resin prepolymer is prepared by modifying a melamine resin prepolymer through lignosulfonate and modified nano cellulose whiskers; the modified nano cellulose whiskers are prepared by modifying nano cellulose whiskers through a silane coupling agent; the second component comprises a composite reinforcing material; the composite reinforcing material comprises a carboxylated carbon nanotube, a montmorillonite-graphene hybrid, a second dispersing agent and a nucleating agent; the carboxylated carbon nano tube is prepared by reacting a carbon nano tube with strong acid; the montmorillonite-graphene hybrid is prepared from montmorillonite and graphene oxide through a reaction. Melamine resin is modified by adopting lignosulfonate and modified nanocellulose whiskers, meanwhile, a reinforcing material is compounded, and the heat resistance and the mechanical property of the melamine resin are improved in combination with a gradient curing process.

The invention relates to the technical field of fiber reinforced resin-based composite materials, and discloses a basalt fiber epoxy resin composite material as well as a preparation method and application thereof. Comprising the following steps: carrying out oxygen plasma treatment and dopamine bionic liquid deposition treatment on basalt fibers, dipping the basalt fibers in a mixed coupling agent solution, and coating the basalt fibers with nano TiO2 sol to obtain nano roughened basalt fibers; mixing bisphenol A epoxy resin, hydrogenated bisphenol A epoxy resin, hyperbranched polyesteramine and ionic liquid modified boron nitride nanosheets to obtain resin A; mixing an epoxy curing agent with a curing accelerator to obtain resin B; and mixing the resin A and the resin B to obtain a mixed material, and infiltrating the nano roughened basalt fibers in the mixed material to obtain the basalt fiber epoxy resin composite material. After the basalt fiber is subjected to bionic multi-stage interface treatment, the basalt fiber is matched with the modified epoxy resin, so that the interface strength, the mechanical property and the weather resistance of the composite material are remarkably improved, and the composite material has a relatively good application scene.

The invention discloses a long glass fiber reinforced polypropylene resin composite material and a preparation method thereof, and belongs to the field of polymer composite materials. The composite material comprises the following raw materials in parts by weight: 50-70 parts of a polypropylene matrix, 20-40 parts of long glass fibers, 2-5 parts of a composite interface modifier, and maleic anhydride grafted polypropylene and an amino silane coupling agent which are compounded according to a weight ratio of 3: 1, and 0.5 to 2 parts of hydrophobic modified nano silicon dioxide. The composite material is prepared through the processes of glass fiber surface pretreatment, multi-component synergistic mixing and precise extrusion molding. According to the invention, through the chemical bonding effect of the composite interface modifier and the surface of the glass fiber, the interface bonding force between the glass fiber and a PP matrix is obviously improved, and meanwhile, the nanoscale damp-heat-resistant auxiliary agent is introduced to construct an anti-permeation barrier, so that the technical problems that the traditional long glass fiber reinforced PP composite material is poor in damp-heat resistance and large in mechanical property fluctuation are solved. After the prepared composite material is aged for 1000 hours in the environment of 85 DEG C / 85% RH, the impact strength loss rate is smaller than or equal to 10%, the tensile strength is larger than or equal to 85 MPa, and the composite material can be widely applied to the fields of automobile exterior trimming parts, household appliance wading parts and the like.

A vehicle body structural member is formed from a fiber-reinforced resin composite. The vehicle body structural member includes a break scheduled part. The break scheduled part is provided on a load input surface to which a collision load is expected to be input. The break scheduled part is configured to, when the collision load is input, undergo a brittle fracture and divide the load input surface into a first region and a second region on both sides respectively in a predetermined first direction. When the collision load is input, a torsion is generated in each of the first region and the second region across the break scheduled part have torsions.

The invention provides a fiber reinforced resin composite material and a preparation method thereof, composite resin and a protective product. The fibers are subjected to surface roughening and / or active groups are introduced to form modified fibers, and the active groups comprise one or more of hydroxyl, alkenyl, alkynyl, amino and halogen; coating the surfaces of the modified fibers with a thermoplastic resin solution grafted with maleic anhydride groups and / or epoxy groups, and performing heat treatment to form a first functional layer; nano particles are attached to the surface of the first functional layer and / or a supramolecular network structure is formed, and a second functional layer is formed. According to the preparation method, the interface bonding performance between the fiber and the resin is remarkably improved, and the prepared fiber-reinforced resin composite material has excellent strength, barrier performance, protection performance and the like.

The invention discloses a preparation method of a high-thermal-conductivity epoxy resin composite material. Belongs to the technical field of epoxy resin composite material preparation. The invention aims to solve the technical problem that the heat-conducting property of the epoxy resin composite material is not obviously improved under the condition of low filling amount. Before the epoxy resin is cured, hexagonal boron nitride in the epoxy resin is oriented along the direction of an electric field by adopting a method of alternating-current electric field induction and multi-dimensional filler compounding, and spherical aluminum oxide exists among hexagonal boron nitride sheets to promote the lap joint of the filler, so that the formation of a heat conduction channel in the epoxy resin is promoted; and the preparation of the high-thermal-conductivity epoxy composite material is realized under a relatively low filling amount. Compared with a common doped composite material, the prepared epoxy resin composite material has the advantages that under the same filling amount, the heat conductivity is obviously improved, and the electrical insulation property is well maintained; the material can be applied to equipment such as a dry-type transformer, and has important significance for realizing high-voltage, large-capacity and high-power operation of the equipment.

The embodiment of the invention provides a carbon nanotube / fluorocarbon resin composite microsphere photo-thermal super-hydrophobic anti-condensation coating and a preparation method thereof.The preparation method comprises the steps that firstly, carbon nanotubes and fluorocarbon resin are evenly dispersed in a solvent, then a small amount of non-solvent water is added to enable a solution system to be subjected to phase separation, and carbon nanotube / fluorocarbon resin composite microsphere dispersion liquid is formed; and finally, spraying the carbon nanotube / fluorocarbon resin composite microsphere dispersion liquid, and curing to obtain the photo-thermal super-hydrophobic anti-condensation coating. The carbon nano tube is in a microsphere shape in the coating, so that a typical micro / nano coarse structure is obtained on the surface, the water drop contact angle of the coating is as high as 158 degrees, the icing delay time is as high as 434s, and the ice adhesion force is as low as 16kPa; under the irradiation of sunlight, the temperature of the coating can be increased to 54.5 DEG C within 10 minutes under the photo-thermal action of the carbon nanotubes, so that the melting of ice is accelerated.

Provide are: a resin composition that has excellent moldability and comprises a maleimide compound and a compound having at least four (meth)allyl groups in one molecule; a cured product; a prepreg; a metal-foil-clad laminate; a resin composite sheet; a printed circuit board; and a semiconductor device. The resin composition comprises a maleimide compound (A) and a compound (B) represented by formula (GU), wherein the maleimide compound (A) has at least two structures represented by formula (Mx) in one molecule and 50-100 parts by mass of a maleimide compound (a1) having a maleimide group equivalent to 300-1,200 g / eq., and another maleimide compound (a2) other than the maleimide compound (a1), and the molar ratio β / α of the maleimide group content (α) of the maleimide compound (A) and the (meth)allyl group content (β) of the compound (B) represented by the formula (GU) in the resin composition is 0.2-3.5.

To provide a method for molding a metal-resin composite material that can suppress springback.SOLUTION: In a method for molding a metal-resin composite material that has a laminated structure in which metal layers and resin layers are alternately laminated, and the laminated structure is asymmetrical, the metal-resin composite material is divided into parts (a) and (b) at half of whole layer thickness, and a total layer thickness of the resin layer in part (a) is Tra, the total layer thickness of the metal layer in part (a) is Tma, the total layer thickness of the resin layer in part (b) is Trb, and the total layer thickness of the metal layer in part (b) is Tmb. If Tma / Tra>Tmb / Trb, molding is performed with the part (a) side placed on a surface to which pressing force is applied. If Tma / Tra<Tmb / Trb, molding is performed by placing the part (b) side on the surface to which pressing force is applied. If Tma / Tra=Tmb / Trb, molding is performed by arranging the side on which the metal layer is located on the surface layer or the side close to the metal layer in the surface layer of the part (a) or (b) on the surface to which pressing force is applied.SELECTED DRAWING: None

Provided are a resin composition, a cured object, a prepreg, a metal-foil-clad laminate board, a resin composite sheet, a printed wiring board, and a semiconductor device. The resin composition according to the present disclosure comprises 10-90 parts by mass of a resin (A) and 90-10 parts by mass of a maleimide compound (B) represented by formula (M4), wherein the resin (A) is represented by formula (T).

The present application relates to the technical field of electronic packaging materials, and particularly relates to a thick copper packaging circuit board capable of resisting high-salt mist corrosion and a preparation method thereof, which comprises the following steps: S1: preparing a glass fiber-BT resin composite core layer for standby; S2: preparing a fluorine-modified polyimide packaging coating solution for standby; S3: preparing a surface corrosion-resistant composite coating for standby; S4: bonding the thick copper foil and the glass fiber-BT composite core layer to obtain a thick copper conductor; S5: applying the fluorine-modified polyimide packaging coating solution to the surface of the thick copper conductor layer to form a packaging layer; S6: spraying the corrosion-resistant coating on the surface of the packaging layer to form a composite corrosion-resistant coating; and S7: performing overall curing and hot pressing to finally obtain a thick copper packaging circuit board product. According to the present application, a multi-layer synergistic protection structure is constructed and the preparation process is optimized, so that the corrosion resistance and structural stability of the thick copper circuit board in a high-salt mist environment are significantly improved.