33 results about "Post curing" patented technology

This invention belongs to the field of ceramic composite material manufacturing technology, specifically relating to a method for preparing SiC composite materials based on cold spraying and silicon infiltration. SiC powder is prepared into a suspension, which is then deposited onto a substrate using a cold gas-powered spraying system to form a porous SiC preform coating. The preform coating undergoes post-curing to enhance its cohesive strength. Finally, melt silicon infiltration is performed, causing silicon to react with carbon in the preform to generate a new SiC phase that fills the pores, resulting in a high-density, high-performance SiC composite component. This method combines the advantages of low-temperature forming in cold spraying with silicon infiltration technology. The relatively low substrate temperature during cold spraying effectively avoids the adverse effects of high temperatures on the material structure, maintaining the stability of the original SiC phase. By adjusting the spraying parameters and matching the silicon infiltration process, the free silicon content and the distribution of the newly generated SiC phase in the composite material can be precisely controlled, further improving the material's density and mechanical properties.

The invention relates to the technical field of composite material continuous forming, in particular to a continuous forming method suitable for a prepreg composite material structural member, and the method comprises the following steps: according to the layering design requirement, a prepreg coiled material is unfolded and layered; heating and mould pressing are carried out on the laid prepreg, so that the prepreg is preformed; the pre-formed prepreg sequentially passes through at least two heating and pressurizing areas with the temperature and the pressure capable of being independently regulated and controlled to be cured; the cured prepreg is subjected to post-curing in a mold at the temperature of 150 DEG C to 170 DEG C and the pressure of 0 MPa to 3 MPa; and pulling the post-cured product to move forwards in a stepping motion mode to obtain the prepreg composite material structural member. The continuous production of the prepreg from laying, preforming and curing to finished products is realized, the size limitation of the traditional autoclave is broken through, and the integrated forming of the super-long structural member becomes possible.

The invention discloses a high-temperature-resistant thermal control film and a preparation method thereof, relates to the technical field of thermal control materials, and aims to solve the problems that the high temperature resistance, the mechanical strength and the component compatibility of a traditional thermal control film are difficult to consider at the same time, and the aging resistance and the environmental corrosion resistance are poor. The preparation method comprises the following steps: by taking polytetrafluoroethylene and fluorinated ethylene propylene as matrixes, firstly preparing silicon-fluorine modified graphene and a modified cross-linking agent, and then preparing a product through the steps of preparation of fluoroalkene grafted graphene composite powder, preparation of pre-crosslinking type mixed slurry, film casting and stepped drying, cross-linking curing, segmented post-curing and the like. Through synergistic modification, a compact three-dimensional cross-linked network is constructed, and process optimization is matched, so that the prepared film has excellent high-temperature-resistant stability, mechanical strength, heat insulation and temperature control effects and flame retardance, and can be widely applied to the fields with strict requirements on thermal control materials, such as aerospace, electronic and electrical engineering and the like.

The present invention relates to a method of producing a coated molded fiber-based product comprising filling at least one recess of a molded fiber-based product with a liquid water-based coating composition and removing excess coating composition to obtain a wet coating film, followed by curing the wet coating film. The invention also relates to a coated molded fiber-based product produced by said method and to the use thereof as a food container.

A method for preparing a variable stiffness flexible composite material tube and its application belong to the field of engineering composite material preparation. The method involves mixing a UV curing agent, an imidazole derivative curing agent, acrylate resin, and epoxy resin, followed by vacuuming to remove air bubbles, then compounding with carbon fiber cloth. Using a polytetrafluoroethylene rod mold, the mixture is irradiated with ultraviolet light for 8-12 minutes, followed by pre-curing at 110-130℃ for 2.5-3.5 hours, and then curing at 140-160℃ for 2.5-3.5 hours to obtain a rigid material. This invention, through molecular synthesis design, prepares imidazole derivatives with higher molecular weights, improving the shelf life of the flexible material and thus significantly increasing the workability. The prepared imidazole derivatives are in a liquid state, greatly improving compatibility with the resin system. Through molecular synthesis design, the prepared imidazole derivatives can undergo a Michael reverse reaction at 120℃, releasing 2-ethyl-4-methylimidazolium, thereby achieving reaction polymerization at a lower temperature and improving application efficiency.

The present application relates to the technical field of wind power blade, and more particularly to a modular wind power blade post-curing tool, comprising a traction flatcar, a deformation prevention support and a plurality of profiled supports; the traction flatcar is arranged on the ground along the length direction of the wind power blade; the deformation prevention support is installed on the root end surface; the plurality of profiled supports are arranged in intervals along the length direction of the traction flatcar, and the parting line of the wind power blade is perpendicular to the ground and then is arranged to rotate counterclockwise by one hole position angle; each profiled support is provided with a profiled plate, the two ends of the profiled plate are respectively bent towards the windward surface and the leeward surface of the wind power blade, the middle part of the profiled plate is in contact with and is limited by the bottom of the wind power blade; the wind power blade can smoothly enter and exit the post-curing furnace, and the occupied area is also reduced; the deformation prevention support forms a five-point support action on the cross-sectional shape of the root section, and the plurality of profiled supports form segmented support actions on the wind power blade, effectively avoiding the deformation of the root section circle and the blade profile of the modular wind power blade.

The invention belongs to the technical field of railway vehicle interior parts, and particularly relates to a manufacturing method of a middle roof plate, which comprises the following steps of: S1, prefabricating a functional module, and temporarily fixing a functional core material and a reinforcing structural member into a standardized module by adopting low-temperature hot melting sewing or a water-soluble binder; s2, substrate thermal forming and synchronous compounding are conducted, specifically, the macromolecule substrate is heated, softened and formed, and the prefabricated module is synchronously combined with a base body in the plastic state of the macromolecule substrate in a melting bonding mode or a reaction bonding mode or other modes; s3, in-situ integration of edge connecting pieces, wherein the connecting pieces are integrated to the edge of the base body through in-mold injection molding coating; and S4, post-curing and finishing. According to the method, traditional discrete and serial procedures are highly integrated through process reconstruction of prefabrication, synchronous compounding and in-situ integration, the problems that in the prior art, the production period is long, and the quality consistency is poor are solved, and efficient, high-precision and high-reliability manufacturing of the middle roof plate is achieved.

To provide systems and methods for determining and correcting a tooling deviation by performing three-dimensional surface scans on a composite panel.SOLUTION: A system and a method allow for less accurate post-cure fixturing (e.g., holding a panel in a less constrained state, as compared to prior art techniques), while still maintaining a sufficient amount of precision for predictive shimming and shimless techniques. The method includes: performing a first three-dimensional surface scan; performing a second three-dimensional surface scan; and comparing the two three dimensional scans to determine a deformation function corresponding to a tooling deviation. In some of the systems, a header structure is used to hold the composite panel in a nominal configuration for the second three-dimensional surface scan. In some of the systems, a scanning device performs mirrored scanning on either of both sides of the composite panel, using a common reference frame.SELECTED DRAWING: Figure 13

The present application relates to the technical field of composite material forming, and particularly relates to a protection treatment method before filling of a core mold of a metal framework with a complex structure. The treatment method comprises the following steps: S100, preparation; S200, preparation of silicone rubber; S300, coating of the filling silicone rubber; S400, filling of the core mold, machining and composite material forming; and S500, completion of product preparation, removal of the core mold and finished product silicone rubber. The treatment method has the advantages of simplifying the operation process, reducing the operation difficulty, improving the labor efficiency, shortening the curing time, making the coating uniform and complete, shortening the protection time of the whole framework, being suitable for the wide temperature range post-curing process requirement, effectively buffering and eliminating the damage of the removal tool to the metal framework, avoiding the resin from entering the hollow hole and the part with a rib plate included angle during the resin pouring process, reducing the difficulty of the core mold removal and the framework cleaning in the later period, and being easier to clean and remove without residue.

The present disclosure relates to a friction material composition comprising reactive poly aryl ether ketone (R-PAEK) as a binder. The present disclosure further relates to a process for the preparation of a friction material composition. Furthermore, the present disclosure relates to a process for the fabrication of an article by using the friction material composition. The friction material composition of the present disclosure does not require post curing while manufacturing brake pads. Further, the article fabricated by using the friction material composition of the present disclosure has longer shelf life and do not evolve noxious by-products and possesses superior physical and tribological properties.

The invention discloses a forming method of a low-cost S-shaped composite material pipeline, which comprises the following steps of: firstly, manufacturing a thermoplastic core mold, paving prepreg by using the thermoplastic core mold as a composite material pipeline paving mold, packaging by using a vacuum bag after paving, and curing at low temperature by using a drying oven; in order to ensure that the composite material pipeline meets various use working condition requirements in a high-temperature environment, high-temperature post-curing treatment needs to be carried out after low-temperature curing is completed, softening of the thermoplastic core mold can be achieved in the high-temperature post-curing process, and demolding of the thermoplastic core mold can also be achieved while the high-temperature post-curing treatment is completed. According to the method, the problems that a core mold of a large-curvature composite material pipeline product cannot be demolded and the core mold is left can be solved, and smooth development of the composite material pipeline with the curvature is achieved; and meanwhile, the thermoplastic core mold can be repeatedly subjected to injection molding and can be repeatedly used, so that the manufacturing cost of using an inflatable air bag and a combined metal core mold is greatly reduced.

The invention relates to the technical field of insulating composite materials, in particular to an electric corrosion resistant hydrophobic insulating composite material for a hot-line work soft sling and a preparation method and application of the electric corrosion resistant hydrophobic insulating composite material. The first purpose of the invention is to provide a preparation method of an anti-electric-corrosion hydrophobic insulating composite material for a hot-line work soft sling, and the preparation method comprises the following steps: dipping an insulating base material in a composite anti-electric-corrosion coating, carrying out vacuum drying for 12-24 hours, and carrying out hot-pressing curing; and after cooling, spraying fluorinated liquid on the surface, and curing to obtain the electric corrosion resistant hydrophobic insulating composite material. According to the electric-corrosion-resistant hydrophobic insulating composite material provided by the invention, through the electric field response characteristic of the modified ZIF-8 nanoparticles, the micro-nano coarse structure of hydrophobic SiO2 and the self-repairing function of the double-effect microcapsules (fluorine-containing silicone oil / epoxy resin core material), the insulation and pressure resistance, hydrophobic durability and electric corrosion damage self-repairing capability of the insulating material are synergistically improved.

The subject matter of the present invention relates to a method for manufacturing a consumable product (10), in particular a consumable product (10) comprising a core (20) which is at least partially, preferably completely, surrounded by a consumable material (11) which is consumed when used and is not consumed or is consumed only minimally when not in use, in particular a consumable material (11) such as a solid soap material, wherein the core (20) comprises at least one object and a packaging material (21) which surrounds the object at least partially, preferably completely, wherein the core (20) is fixedly positioned in the consumable product (10) and / or embedded, wherein the consumable product (10) is designed without a holder or container for manual use, wherein the steps comprise: providing an object to be packaged in a core (20), providing a packaging material (21) in which the object is to be packaged,Surrounding the object with the packaging material (21) and at least partially displacing a fluid environment, in particular air, from the packaging material (21) surrounding the object, sealing the packaging material (21) so that the object is tightly, in particular fluid-tightly, surrounded by the packaging material (21) and a core (20) with a predetermined density is created, embedding the core (20) in the consumable material (11) in an at least partially liquid state and positioning the core (20) in a predetermined position in the at least partially liquid consumable material (11) and solidifying the consumable material (11) so that the core (20) is fixedly positioned and / or embedded in the consumable product (10), wherein the core (20) comprising the object and the packaging material (21) together with the enclosed fluid environment has a density that is selected such thatthat the core (20) does not float or only floats to the surface in the liquid consumable (11), or only to an insignificant extent. The invention further relates to a product and a device therefor.

The invention relates to the field of composite materials, and provides a carbon fiber foam sandwich pultrusion profile with a cavity structure and an integral forming method, and the integral forming method comprises the following steps: pre-forming the carbon fiber pultrusion profile with the cavity structure by a reinforcing material; entering a resin impregnation area, and impregnating the reinforcing material through resin; performing heating and primary curing in the heating and curing area; the preliminarily cured carbon fiber pultrusion panel with the cavity structure leaves the heating curing mold and then enters a temperature control foaming mold, and resin to be foamed is injected into a cavity of the carbon fiber pultrusion panel with the cavity structure through a built-in glue injection pipeline of a core mold for online foaming; and after online foaming is completed, post-curing is carried out, and finally cooling is carried out. According to the integrated forming method of the pultrusion profile of the carbon fiber foam sandwich with the cavity structure, integrated forming of the pultrusion profile of the carbon fiber foam sandwich with the cavity structure filled with the low-density foam material is achieved, the bonding strength of the pultrusion panel and the foam sandwich is improved, and the efficiency is improved.

This invention relates to the field of adhesive technology, specifically to a high-reliability underfill adhesive suitable for large-size chips and its preparation method. The raw materials of the underfill adhesive, by weight, include: 25-35 parts of bisphenol F epoxy resin, 1-3 parts of bisphenol A epoxy resin, 0.5-2 parts of silicone-modified epoxy resin, 0.5-1.5 parts of black paste, 0.8-1.2 parts of coupling agent, 0.1-0.5 parts of flow aid, 50-55 parts of spherical filler, 10-15 parts of curing agent, 0.2-0.8 parts of accelerator premix, and / or 0.5-1 parts of additives with controllable post-curing properties. This invention independently synthesizes the accelerator premix and additives with controllable post-curing properties, resulting in a moderate increase in glass transition temperature and high-temperature modulus, and a moderate decrease in room-temperature modulus, achieving the same level of reliability fatigue as the chip, substrate, and bump substrates, thereby improving the reliability of the chip module.

The invention provides low-temperature curing type vacuum hole-filling silver paste and a preparation method thereof, and the low-temperature curing type vacuum hole-filling silver paste comprises the following components in percentage by weight: 5%-25% of resin, 60%-80% of large-particle-size silver powder, 1%-10% of nano silver powder, 1%-3% of a curing agent, 0.1%-1% of a dispersing agent, 1%-3% of a solvent, 0.1%-1% of a coupling agent and 0.2%-1% of a curing accelerator, and the viscosity of the low-temperature curing type vacuum hole filling silver paste is 100-200pa. S / 25 DEG C. The porefilling silver paste is suitable for a vacuum printing porefilling process, the problem that the viscosity is increased during porefilling is solved, and the rheological property of the paste is good; in addition, the porefilling silver paste can be cured at low temperature, in the process of curing after porefilling, the probability of pore generation is greatly reduced, and the porefilling compactness, the filling rate, the flatness and the conductivity are optimized.

[Problem] To provide: a curable composition with which deterioration in the physical properties of a cured product can be suppressed even when a curing time is shortened; and an electronic component device comprising the cured product. [Solution] This curable composition comprises a curable component, wherein when the glass transition temperature of a cured product obtained by post-curing, under the conditions of 175ºC and 3 hours, a molded product obtained by molding said curable composition under the conditions of a mold temperature of 175ºC and a curing time of 150 seconds is defined as Tg1, and the glass transition temperature of a cured product obtained by post-curing the molded product under the conditions of 175ºC and 5 hours is defined as Tg2, Tg1 / Tg2 is at least 0.9.

The application provides a production method of an optical fiber receiving device, which comprises the following steps: initially preheating a solid epoxy resin; heating an injection mold; placing a frame with a chip into a mold cavity of the heated injection mold, and performing mold closing; adding the preheated epoxy resin cake, pressing the epoxy resin cake into the mold cavity through a pressing rod of an injection machine, discharging air in the mold cavity through an exhaust passage, and performing high-temperature curing for a period of time; stopping air discharge, obtaining the optical fiber receiving device, and placing the optical fiber receiving device at room temperature for cooling; performing post-curing treatment, filling a protective gas in a high-temperature oven; performing high-low temperature cycle treatment, and screening out unqualified optical fiber receiving devices. The application solves the problems of low qualification rate and reliability of the device produced by the traditional packaging process, and reduces the requirement for the consistency of raw materials, improves the qualification rate of products, and reduces the cost effect.

The application belongs to the technical field of silicone and release paper material, and discloses a silicone release agent for coated paper, a preparation method and application thereof. The silicone release agent for coated paper comprises the following components: 50-100 parts of end-vinyl polysiloxane, 10-30 parts of branched vinyl polysiloxane, 1-10 parts of hydrogen-containing polysiloxane, 0.1-10 parts of epoxy tackifier and 1-10 parts of platinum catalyst. The silicone release agent can be rapidly cured at low temperature of 80-130 DEG C. In addition, the addition of the self-made epoxy tackifier can significantly improve the adhesion between the release layer and the surface of the coated paper, and the coated paper can not be desiliconized for more than 10 days under the aging environment of high temperature and high humidity of 85 DEG C and 85% RH. The release paper disclosed by the application is obtained by curing the release agent on the coated paper, and solves the problems of slow curing, incomplete curing, serious post-curing, poor environmental resistance and easy desiliconization in a high temperature and high humidity environment of the existing coated release paper.

The application relates to a eugenol-based high-heat-resistance and high-flame-retardant epoxy resin composition based on D-A addition, a preparation method and application thereof, and belongs to the technical field of high-performance epoxy resins. The specific scheme is as follows: eugenol epoxy monomers and bismaleimide are added in a proper proportion, heated and uniformly mixed at 80-150 DEG C to obtain a clear and transparent solution, a proper proportion of amine curing agent is added into the solution, uniformly mixed, and then poured into a mold after vacuum bubble removal treatment, and cured into a shape in two stages of pre-curing and post-curing. Compared with a commercial epoxy resin curing system, the eugenol-based epoxy resin composition has excellent heat resistance, outstanding flame retardant performance, and meanwhile, excellent mechanical performance and processing performance are maintained. The application provides a new strategy for the application and popularization of bio-based epoxy resins, and the preparation process is simple, the cost is low, and industrial production is easy.

Systems and methods for forming and using a pressure housing to protect a downhole tool in a wellbore include machining an initial syntactic foam body into a pressure housing structure and post-curing the pressure housing structure in a programmable oven at a time-temperature program to produce a post-cured syntactic foam structure. Methods for protecting a downhole tool in a wellbore include containing the downhole tool in a post-cured syntactic foam structure, placing the structure in the wellbore and using the downhole tool contained in the post-cured syntactic foam structure in the wellbore, floating the post-cured syntactic foam structure containing the downhole to a surface location, and retrieving the post-cured syntactic foam structure containing the downhole tool. Systems for protecting a downhole tool in a wellbore include a post-cured syntactic foam structure positioned in the wellbore and a downhole tool pressure sealed within the post-cured syntactic foam structure.

The invention relates to a high-temperature-resistant organosilicon foaming material with a sandwich structure and a preparation method thereof, and belongs to the technical field of polymer composite materials. The high-temperature-resistant organosilicon foaming material with the sandwich structure is of an integrated sandwich structure, comprises a core layer and skin layers arranged on the two sides of the core layer respectively, and specifically comprises an organosilicon resin matrix, a key functional compound, a fiber reinforcement body and a foaming and curing system. The preparation method comprises the following steps: step 1, pretreating the fiber reinforcement; 2, preparing core layer foaming slurry; step 3, preparing a skin layer impregnating resin and forming a prepreg; step 4, performing integrated compression molding on the sandwich structure; and step 5, post-curing. Through the sandwich structure design and the introduction of the key interface modifier, the synergistic improvement of light weight, high strength, flame retardance and supernormal high temperature resistance is realized.

The invention relates to the technical field of processing and manufacturing of glass decorative protective films, and discloses a multipurpose high-viscosity replicable glass film and a preparation method thereof. Comprising the following steps: by taking a flexible polymer film as a base material, performing corona treatment with specific parameters to form an activated surface, coating an ink-jet printing layer containing inorganic nano silicon dioxide, and drying; then preparing an embossed polyethylene release film, coating a waterborne hot melt adhesive in a dotted manner to form a bonding layer, performing hot-pressing compounding on the base material and the release film, and performing post-curing, curing and slitting to obtain a finished product. Through refined process parameter control and optimization of the surface activity of the base material and the adhesive layer structure, the product has high viscosity and recoverability, is bubble-free in lamination, easy to construct, firm in printing layer adhesion, clear in pattern, weather-proof and environment-friendly, meets the requirements of multi-scene glass films, is stable in process and is suitable for large-scale production.

Disclosed in the present application is a method for manufacturing a target object by means of an additive manufacturing system. The method comprises: aligning a forming platform with a first carrying device, and then curing a first material to form a first portion of a first layer, the first portion having a first thickness; aligning the forming platform with a second carrying device, and then curing a second material to form a second portion of the first layer, the second portion of the first layer having a second thickness greater than the first thickness; and aligning the forming platform with the first carrying device again, and then forming a first portion of a second layer on the first portion of the first layer, such that the total thickness of the first portion formed from the first material is greater than that of the second portion formed from the second material.

The invention relates to the technical field of high polymer material molding and precision part manufacturing, in particular to a method for preparing a high-wear-resistance guide wheel through liquid phenolic resin hot press molding and a guide wheel. The method comprises the steps that liquid thermosetting phenolic resin, a fiber reinforced material and optional functional filler and auxiliaries are provided; fully stirring and mixing the raw materials, so that the fiber reinforced material and the functional filler are uniformly infiltrated by the liquid thermosetting phenolic resin to obtain a premix; cleaning a hot-pressing die, uniformly spraying a release agent on the surface of a cavity, preheating the die to 80-100 DEG C, weighing the premix, and filling the premix into the cavity of the die; carrying out hot-pressing curing, namely carrying out stepped heating, pressurizing and curing in a hot press; and demolding to obtain a guide wheel product, and carrying out post-curing treatment on the guide wheel product. By optimizing the material and the hot-pressing process and adjusting the types, lengths and contents of the fibers and the filler, the product is excellent in performance, wide in application, easy in mass production, designable and capable of meeting the requirements of various scenes.

The invention discloses a steel pipe weld joint epoxy spraying intelligent robot and a spraying method, and relates to the technical field of weld joint spraying robots, the robot main body is provided with a permanent magnet roller and a limiting pipe fitting controlled by a motor, a spraying hose and a hard pipe connecting nozzle are arranged in the robot main body, and the robot main body is further provided with an air outlet piece communicated with an air heater; the first dust collection assembly and the second dust collection assembly can adsorb dust particles through the electrostatic generator, the driving assembly achieves rotary spraying of a spray head, the problems of coating defects and airflow interference caused by weld joint water drops and dust are solved, weld joint cleaning pretreatment, stable spraying and post-curing integration is achieved, the adhesiveness and uniformity of a coating are improved, and the coating quality is improved. And material waste and cleaning cost are reduced.

The invention provides a novel sealed bearing grinder electromagnetic chuck coil sealing pouring method which comprises the steps that epoxy resin and a diluent are mixed and stirred to reduce the viscosity of a mixed system, and a first mixture is formed; adding a coloring agent and a filling agent into the first mixture; wherein the coloring agent and the filling agent are sequentially or simultaneously added; if the materials are sequentially added, stirring is carried out after each time of adding; if the materials are added at the same time, stirring after all the materials are added; finally forming a second mixture; adding a curing agent into the second mixture, and stirring to form a target pouring material; and a target pouring material is injected into the mold where the coil is placed, and pouring and packaging are completed. Through the steps of firstly reducing viscosity, then mixing solids step by step and finally curing, the problems that powder is agglomerated and wraps air due to one-time feeding in the original process, bubbles are difficult to remove, and the product is easy to burst are solved; internal bubbles are reduced; and the compactness of the packaging body is improved.

This invention discloses a method for preparing a smart bidirectional liquid transport surface based on the synergy of Araucaria heterophylla structure and pH response. The method includes the following steps: Step 1, design, optimization, and semi-curing printing of an Araucaria heterophylla-inspired structural model; Step 2, preparation of a pH-responsive particle modification solution; Step 3, swelling modification and post-curing of the semi-cured model; Step 4, drying and post-treatment. This invention introduces pH-responsive particles into the biomimetic structure of Araucaria heterophylla, enabling the surface to intelligently switch the transport direction of high surface tension liquids according to the liquid's pH value, achieving reversible switching of the transport direction and overcoming the limitations of traditional unidirectional and irreversible surface transport. Through a "semi-curing-swelling-post-curing" process, the pH-responsive particles are firmly anchored to the three-dimensional hypercurvature ratchet surface, retaining the inherent capillary-driven characteristics of the structure while endowing it with dynamic responsiveness to the chemical environment.

The invention discloses a high-thermal-conductivity oil-resistant composite material and a preparation method thereof.The composite material is of a three-layer symmetrical structure and sequentially comprises upper-layer domestic high-thermal-conductivity aramid paper, a modified polyamide-imide film and lower-layer domestic high-thermal-conductivity aramid paper from top to bottom, the upper-layer domestic high-thermal-conductivity aramid paper and the lower-layer domestic high-thermal-conductivity aramid paper are bonded with the modified polyamide-imide film through a modified polyurethane adhesive; and the preparation method of the composite material comprises the following steps: preparing the modified polyurethane adhesive, compounding for the first time, pre-curing at low temperature, compounding for the second time, post-curing, slitting and packaging. The heat-conducting property is greatly improved; the oil-resistant stability is excellent; the cost advantage is obvious; the process feasibility is high.