273 results about "Heat deflection temperature" patented technology

The invention relates to a preparation method of high-heat-resistance low-warpage glass fiber reinforced flame-retardant PBT (Polybutylene Terephthalate) engineering plastic, which comprises the following steps: firstly, adding a premix into a double-screw extruder for melting, then respectively feeding a flame retardant and glass fiber into the double-screw extruder from a lateral feeding port, mixing with the molten premix, and extruding to obtain the high-heat-resistance low-warpage glass fiber reinforced flame-retardant PBT engineering plastic. After mixing, extruding a strip-shaped object from a machine head mouth mold of the double-screw extruder, finally cooling the strip-shaped object in a cooling water tank, and granulating by a granulator to obtain the high-heat-resistance low-warpage glass fiber reinforced flame-retardant PBT engineering plastic. The premix is obtained by uniformly mixing PBT resin II, low-warpage PBT master batch, a compatilizer, a crystallization inhibiting polymer, a flame-retardant synergist, an inorganic filler, a nucleating agent and other auxiliaries; the low-warpage PBT master batch is prepared by uniformly mixing PBT resin I, a transesterification inhibitor, a transesterification inhibition synergist and other auxiliaries and then carrying out melt extrusion granulation. The warping problem of the glass fiber reinforced flame-retardant PBT engineering plastic is solved, and the glass fiber reinforced flame-retardant PBT engineering plastic has relatively high thermal deformation temperature.

The invention discloses a low-shrinkage creep-resistant plastic-wood product and a preparation method thereof, and belongs to the technical field of plastic-wood composite materials. The composite material is prepared from the following raw materials in parts by weight: 10 to 18 parts of polypropylene, 22 to 35 parts of high-density polyethylene, 58 to 83 parts of eucalyptus / walnut shell / montmorillonite composite modified powder, 10 to 15 parts of hydroxyl-terminated polybutadiene and graphene / ZnO2 / CaO, 7 to 15 parts of basic magnesium sulfate whisker, 3 to 4.6 parts of gamma-glycidyl ether oxypropyl trimethoxy silane and 0.3 to 1 part of antioxidant. In this way, the plastic-wood product is high in low-temperature impact strength, good in creep resistance, small in linear thermal expansion coefficient and high in thermal deformation temperature. Specifically, the impact strength of the plastic-wood product is 6.96-7.27 KJ / m < 2 >; the tensile creep modulus is 18.8 to 21.6 Mpa; the linear thermal expansion coefficient is 2.5-3.1 * 10 <-5 > / DEG C; the thermal deformation temperature is 163.2 to 178.5 DEG C;

The invention belongs to the technical field of nylon materials, and particularly relates to a high-heat-resistance halogen-free flame-retardant nylon material and a preparation method thereof. According to the invention, PA6 and PA66 base materials are compounded by utilizing the high heat resistance of PA66 and the processability advantage of PA6, and the heat deformation temperature of the material is improved through the synergistic effect of the modified glass fiber reinforcing agent and the antioxidant, so that the heat-resistant requirements of high-end scenes such as new energy automobile battery components and high-temperature electronic components are met. Halogen flame retardants are completely abandoned, the modified halogen-free flame retardant is adopted, the flame retardant effect is achieved, meanwhile, no harmful halogen hydride gas or dioxin is released during combustion, and the material still keeps excellent rigidity and toughness on the basis of high flame retardance and high heat resistance and is suitable for popularization and application. The problem that the mechanical property of a traditional halogen-free flame retardant is reduced due to high addition amount is solved.

The invention discloses a modified polyphenyl ether material as well as foamed beads and a foamed molded body thereof, and belongs to the technical field of chemical engineering. The modified polyphenyl ether material comprises the following components: polyphenyl ether, a cross-linking agent containing carbonyl, and a cross-linking auxiliary agent containing divalent metal ions, wherein carbonyl oxygen atoms in the cross-linking agent are connected with metal atoms in the cross-linking auxiliary agent to form a reversible cross-linking structure. According to the present invention, with the reversible cross-linked structure, the modified polyphenyl ether material has good mechanical property at the normal temperature and the temperature lower than the thermal deformation temperature (HDT), and the reversible cross-linked structure is destroyed during the high temperature preparation process so as to significantly improve the flow property and the processing property of the modified polyphenyl ether material; the method has great significance for solving the problems of poor melt fluidity and difficult processing of the polyphenyl ether material, and provides a new thought for improving the foaming performance of the polyphenyl ether foaming material.

The present application discloses cellulose ester compositions comprising starches having a degree of branching of from 2 to 6. The cellulose ester compositions exhibit improved industrial compostability and higher heat deflection temperatures over cellulose ester compositions having lower degrees of branching.

The invention relates to the technical field of polymeric membrane materials, in particular to a functional packaging membrane material and a preparation method thereof. The packaging film material is prepared from PET, PLA, a modifier and an ultraviolet absorbent, wherein the modifier is formed by grafting dimethyl terephthalate, ethylene glycol and dihydroxyl-terminated polylactic acid to the surface of carboxylated graphene after ester exchange. Under the synergistic effect of the carboxylated graphene nanosheets and the modifier, the uniform dispersion and interface bonding strength of the nanofiller are effectively improved, so that the compatibility of PET (Polyethylene Terephthalate) and PLA (Polylactic Acid) is optimized. According to the structural design, the comprehensive performance such as tensile strength, toughness, gas barrier property and thermal deformation temperature of the composite material can be remarkably improved, and meanwhile, good processability and degradability of the material are guaranteed. The invention provides reliable technical support for developing a novel green packaging film material with high performance and low environmental burden, and has wide industrial application prospect.

Disclosed in the present invention are a polyamide composition having high performance and high-temperature resistance, a preparation method therefor, and the use thereof. The polyamide composition consists of the following raw materials in parts by weight: 21-84.99% of polyamide resin having high-temperature resistance, 5-20% of hyperbranched aromatic-aliphatic copolymerized polyamide, 10-50% of a reinforcer, 0.01-5% of a crosslinker, 0-1% of an antioxidant, 0-2% of a processing aid, and 0-1% of a color masterbatch. During an impregnation process, the crosslinker in the formula can realize the crosslinking of the polyamide resin having high-temperature resistance and the hyperbranched aromatic-aliphatic copolymerized polyamide by means of chemical bonds, thereby avoiding the influence of the hyperbranched aromatic-aliphatic copolymerized polyamide on the heat deformation temperature (HDT) of the polyamide composition having high-temperature resistance. Said polyamide composition prepared by the present invention exhibits excellent mechanical properties and thermal properties, is an ideal material for "plastics replacing steel", and can be applied in the fields of automobiles, smart home, photovoltaics, etc.

The present application discloses cellulose ester compositions comprising starches having a degree of branching of from 2 to 6. The cellulose ester compositions exhibit improved industrial compostability and higher heat deflection temperatures over cellulose ester compositions having lower degrees of branching. The present application also discloses processes for making the compositions and articles made from the compostions.

A heat retentive server includes a chamber defined between an upper shell and a lower shell that are connected to one another. An induction-heatable member is positioned in the chamber, and the induction-heatable member may be heated by electromagnetic induction to a first temperature that is greater than the heat deflection temperature of the upper shell. Buffering material is positioned in the chamber between the induction-heatable member and the upper shell, and the buffering material is adapted for providing predetermined conductive heat transfer from the induction-heatable member to the upper shell so that at least a portion of the upper shell is heated to a second temperature that is greater than the heat deflection temperature of the upper shell. The second temperature is less than the first temperature.

The invention provides a high-flame-retardant burnthrough-resistant PC alloy and a preparation method thereof. The PC alloy comprises the following components: branched PC resin with a special blocking rate, 4-10 parts of aryl p-toluenesulfonate and glycidyl ester, wherein the blocking rate of the branched PC resin is 85-95%. The heat resistance, melt strength and burnthrough resistance of the PC alloy are remarkably improved, the heat deformation temperature is increased to 132 DEG C from 122 DEG C, the needle flame S.2 burnthrough time is increased to 150 s or above from 15 s, high flame retardance and burnthrough resistance of a PC product are achieved, and meanwhile the original mechanical performance and thermal performance of PC resin are not affected.

The invention relates to the technical field of polymer optical materials, in particular to an optical-grade polymethyl methacrylate material and a preparation method thereof, and the optical-grade polymethyl methacrylate material comprises the following raw materials in parts by weight: 95-105 parts of methyl methacrylate, 200-240 parts of a composite liquid medium, 1.5-2.5 parts of a composite additive and 0.08-0.12 part of an initiator. According to the invention, the composite additive is used as a main material and the composite liquid medium is used as an auxiliary material, so that the heat resistance and the size stability of the material are synergistically improved, powder in the composite additive is uniformly dispersed in a methyl methacrylate matrix to form a compact physical support skeleton, and the powder is matched with a treating agent and a methyl methacrylate molecular chain to form strong chemical bond combination; the composite liquid medium optimizes the flowability of a polymerization system, reduces polymerization internal stress residues, avoids material deformation caused by internal stress release at high temperature, and enhances high-temperature stability.

The application discloses a large-current aluminum alloy conductor polypropylene insulated medium-voltage power cable and belongs to the technical field of cable preparation, which is used to solve the technical problem that the shielding performance and heat dissipation performance of the polypropylene insulated power cable in the prior art need to be further improved. The polypropylene insulated power cable prepared by the application introduces modified core-shell carbon-nitrogen bodies and silicon-oxygen-nitrogen polypropylene into a polypropylene insulation layer, and a nucleating agent is used to regulate the crystalline structure. The modified core-shell carbon-nitrogen bodies improve the interface heat conduction and charge distribution, the silicon-oxygen-nitrogen polypropylene enhances the chain segment stability and crystalline compactness, and the nucleating agent makes the matrix form a uniform microstructure. Through the structure design, the cable insulation layer maintains a high level in terms of heat distortion temperature, thermal conductivity and volume resistivity, and at the same time, good electromagnetic shielding efficiency is realized, and the heat resistance, thermal conductivity and insulation performance are comprehensively improved.

The invention relates to the technical field of polyester composite materials, in particular to a reinforced flame-retardant polyester composite material for a baking all-in-one machine shell and a preparation method of the reinforced flame-retardant polyester composite material for the baking all-in-one machine shell. The polybutylene terephthalate and the polybutylene terephthalate cooperate to obtain higher heat deformation temperature, heat resistance and high strength, and the polybutylene terephthalate has better fatigue resistance and dimensional stability and smaller creep deformation; the graft modified thermoplastic polyester elastomer is added, the special thermosensitive hydrophobicity of the graft modified thermoplastic polyester elastomer and the toughening property of the thermoplastic polyester elastomer are utilized, and the graft modified thermoplastic polyester elastomer, the toughening agent and the antioxidant have a synergistic effect, so that the hydrolysis resistance, the high-temperature and high-humidity resistance, the weather resistance, the high-low temperature impact toughness and the low shrinkage rate of the polyester composite material are improved; the added brominated flame retardant and halogen-free flame retardant have a synergistic flame retardant effect, so that the flame retardant requirement of the material can be met; the glass fibers have hydrolysis-resistant and low-warping effects, low shrinkage can promote the structure flatness of the product, and the glass fibers are particularly suitable for producing the baking all-in-one machine shell.

The invention relates to the technical field of high-performance pipe preparation, in particular to a heat-resistant Krah pipe and a preparation method thereof. The ultrahigh-density polyethylene composite material is prepared from ultrahigh-density polyethylene, polyaryletherketone, boron nitride-silicon carbide nanowire-graphene three-dimensional network filler, a maleic anhydride grafted ethylene-octene copolymer, organic montmorillonite, silane coupling agent modified carbon fibers, a composite antioxidant and a lubricant. The three-dimensional network filler is prepared by carrying out hydroxylation on graphene, modifying with a silane coupling agent, and reacting with aminated boron nitride nanosheets and silicon carbide nanowires under the action of a cross-linking agent; the modified carbon fiber is obtained by ultrasonic treatment of a silane coupling agent solution and high-temperature drying. Through the innovative formula and process, the heat deformation temperature of the Krah pipe exceeds 280 DEG C, the ring stiffness reaches 18 kN / m or above, the elongation at break reaches 300% or above, and the chemical resistance is improved; the gradient cooling process controls the longitudinal shrinkage rate to be smaller than 1%, the production cost is reduced, and the advantages of high temperature resistance, extrusion resistance, long service life and economical efficiency are achieved.

The invention relates to the technical field of full mold casting, and provides an evanescent mode dry sand negative pressure molding process, EPS particles are doped with nanometer silane modified silicon dioxide with the mass percentage being 0.5% of that of the EPS particles, so that the strength of a foam model is improved by 20%, the heat deformation temperature is increased to 80 DEG C, and deformation in the molding and pouring process is reduced. The coating of the bottom layer of the model adopts 20% of bauxite and 5% of carbon fibers to be matched with a water-based binder, so that the air permeability is enhanced, and the coating of the surface layer of the model adopts 60% of emery and 10% of silica powder to be matched with a water-based binder, so that the fire resistance is improved. Pre-jolt ramming and main jolt ramming are carried out after sand filling, so that the compactness uniformity of dry sand is improved to 95% or above; sealing is carried out, main vacuumizing and auxiliary vacuumizing are carried out, the vacuum degree sealing performance during pouring is guaranteed, then pouring forming is carried out, and the vacuum degree is monitored in the pouring process, so that the stability of the vacuum degree in the pouring process is guaranteed; and finally cooling and releasing negative pressure to obtain the casting.

The invention discloses a PC (polycarbonate) composition and a preparation method and application thereof, and belongs to the technical field of high polymer materials, the composition is compounded by introducing cellulose nanocrystals and sulfone polymers into PC resin, so that the chemical resistance of a product can be effectively improved, the product can still maintain stability after being in contact with various organic components, and the stability of the product is improved. Meanwhile, the high and low temperature resistance is remarkably improved, the toughness retention rate of the product at low temperature is high, the thermal deformation temperature is high, and the comprehensive performance is excellent.

The invention provides a polylactic acid composite material and a preparation method thereof, and the preparation method comprises the following steps: levorotatory polylactic acid, dextrorotatory polylactic acid and a compatibilizer are subjected to a reaction to obtain a stereocomplex microcrystal, and the stereocomplex microcrystal and a dynamic cross-linked polyurethane prepolymer are subjected to a blending reaction to obtain the polylactic acid composite material. According to the invention, the toughness and the heat resistance of the polylactic acid composite material are improved by utilizing the dynamic cross-linked polyurethane to cooperate with the stereocomplex microcrystals, and the highest elongation at break can reach 302 + / -15% while the unnotched impact strength of the material is maintained to be greater than or equal to 48 MPa; and the maximum thermal deformation temperature can reach 98.6 DEG C.

Hybrid side skirts (102) for a motor vehicle, comprising: a pultruded profile part (100) comprising a continuous fiber-reinforced thermoplastic polymer (512) with a heat distortion temperature of at least 200 °C; and a connecting part (104) attached to an end portion (110) of the pultruded profile part (100), which comprises steel; and at least one metal bracket (106) which is fastened to the pultruded profile part (100) and within a convex profile section (111) of the pultruded profile part (100); and at least one crash body (114) fastened to the pultruded profile part (100), which crash body comprises steel and / or a thermoplastic polymer, wherein the pultruded profile part (100) is fastened to an Ω-profile steel beam (710), and wherein the crash body (114) is bonded to a hollow profile section (706) and an outer wall (103) of the convex profile section (111) in such a way that it extends from the outer wall (103) of the pultruded profile part (100) to an opposite inner wall (713) of the Q-profile steel beam (710) in such a way that a gap (714) remains.

The present application discloses a kind of polyethylene terephthalate mixture and its preparation method and application, the polyethylene terephthalate mixture includes the following components: polyethylene terephthalate resin 45-86 parts by weight, toughening agent 0-10 parts by weight, reinforcing agent 10-50 parts by weight, nucleating agent 0.7-10 parts by weight, processing aid 0-3 parts by weight.The nucleating agent includes the combination of long-chain linear saturated lignosulfonate, talcum powder and polyethylene.The forming property of the polyethylene terephthalate mixture of the present application is further improved, the forming cycle is greatly shortened, the mechanical strength, toughness and heat distortion temperature can be maintained relatively high, the application range is further expanded, not limited by color, and can be applied to full-color products.

An acrylic resin composition for a sensor cover, comprising: an acrylic resin (A); and a light absorber (B). The acrylic resin composition has a deflection temperature under load of 110 DEG C or more. A molded body of the acrylic resin composition having a thickness of 1 mm has optical properties satisfying all requirements (i) to (v). (i) The maximum transmittance is 10% or less when light having a wavelength of 380-700 nm is caused to enter the molded body at an angle of incidence of 0 DEG. (ii) the minimum transmittance is 85% or more when light having a wavelength of 850-950 nm is caused to enter the molded body at an angle of incidence of 0 DEG; (iii) the average transmittance is 85% or more when light having a wavelength of 1,500-1,600 nm is caused to enter the molded body at an angle of incidence of 0 DEG; (iv) 0.9 < = (transmittance of light when light having a wavelength of 900 nm enters the molded body at an angle of incidence of 60 DEG) / (transmittance of light when light having a wavelength of 900 nm enters the molded body at an angle of incidence of 0 DEG) < = 1.1; and (v) 0.9 < = (transmittance of light when light having a wavelength of 1,550 nm enters the molded body at an incidence angle of 60 DEG) / (transmittance of light when light having a wavelength of 1,550 nm enters the molded body at an incidence angle of 0 DEG) < = 1.1.

A method of manufacturing a dual-cured polymer component includes additively manufacturing a green state component from a liquid photopolymerizable material; and dual post-curing the green state component by UV curing and thermal curing such that the dual-cured component is formed. The liquid photopolymerizable material has a composition includes an oligomer with a glass transition temperature greater than about 100° C., a monomer, and a photoinitiator. The thermal curing step is completed in a nitrogen environment to a temperature greater than the glass transition temperature of the oligomer. The dual-cured component has a heat deflection temperature between about 100° C. and 250° C. and an elongation at break between about 5% and 20%.

The invention belongs to the field of color master batches, and particularly discloses a low-shrinkage antistatic color master batch, a PBT loose tube, an optical cable containing the PBT loose tube and a production method of the optical cable. The low-shrinkage antistatic color master batch comprises PET, a carbon nanotube, a pigment and an auxiliary agent, the PET is used as a carrier for reducing the shrinkage rate of a PBT loose tube, and the carbon nanotube is used as an antistatic agent for reducing static electricity of the color master batch. PET is adopted as a carrier, shrinkage of the loose tube can be reduced to balance the problem that the excess length of the PBT loose tube is too large due to addition of color master batches, and PBT / PET alloy generated in the generated loose tube has the excellent performance of being high in strength, good in rigidity, high in heat deformation temperature, good in size stability, good in surface glossiness and the like; meanwhile, the carbon nanotubes are adopted as the antistatic agent, so that the conductivity of the color master batch can be improved to reduce the electrostatic effect, and the strength and toughness of the PBT loose tube can be remarkably improved.

The utility model discloses a connector, which comprises a connector body, an internal protection part, a middle protection layer and an external protection layer, and is characterized in that the connector body comprises a connector rubber core and a circuit board arranged on the connector rubber core; the internal protection part is encapsulated on the circuit board; the middle protection layer is encapsulated at one end, close to the circuit board, of the internal protection part and the connector rubber core; the external protection layer is encapsulated at one end, close to the circuit board, of the middle protection layer and the connector rubber core; the material thermal deformation temperature of the internal protection part is smaller than that of the middle protection layer, and the material thermal deformation temperature of the middle protection layer is smaller than that of the external protection layer.

The invention provides a composite wear-resistant material. The composite wear-resistant material comprises a supporting layer, a transition layer and a wear-resistant layer which are sequentially stacked, the supporting layer comprises thermoplastic polyetherimide, first reinforced fibers and inorganic filler, the heat deformation temperature of the supporting layer is T1 DEG C, and the compression strength at 150 DEG C is P1 MPa; the transition layer comprises thermoplastic polyimide, thermoplastic polyetherimide and second reinforced fibers, the thermal deformation temperature of the transition layer is T2 DEG C, and the compression strength at 150 DEG C is P2 MPa; the wear-resistant layer comprises thermoplastic polyimide, third reinforced fibers and a solid lubricant, the thermal deformation temperature of the wear-resistant layer is T3 DEG C, the compression strength at 150 DEG C is P3 MPa, the friction coefficient of the wear-resistant layer is 0.18-0.27, the absolute value of the difference between any two of T1, T2 and T3 is within 10, and the absolute value of the difference between any two of P1, P2 and P3 is within 5.

The invention provides an integrated inductor formed based on a magnetic composite material and a winding and a manufacturing method of the integrated inductor. The integrated inductor comprises a main magnetic ring, iron-based nanocrystalline powder and composite powder which are formed in an axial magnetic field orientation mode under the pressure of 500-700 MPa, the winding and an internal gradient layer. The crushed magnetic particle mixture is of a chain structure of Fe-Si-B-Cr amorphous crushed magnetic particles which are directionally arranged in a magnetic field, and the external coating layer is made of a high-thermal-conductivity magnetic composite material. According to the invention, a three-stage magnetic circuit design is formed by the high saturation magnetic induction intensity of the main magnetic ring, the structural support, the magnetic resistance shunt of the transition layer, the stress buffer and the broadband response and thermal management of the coating layer, so that the broadband response of DC-5MHz is realized, and the saturation current is improved; meanwhile, an epoxy resin-cyanate ester-polysulfide rubber composite matrix is subjected to triazine ring crosslinking and elastomer modification, so that the thermal deformation temperature reaches 200 DEG C or above, meanwhile, the interlayer CTE difference is reduced, and the forming yield is increased.

The application discloses a polyolefin resin composition and a preparation method and application thereof, and the polyolefin resin composition comprises the following components in parts by weight: linear PE resin 60-92 parts; HDPE 2-10 parts; and cyclic polyolefin resin 6-30 parts; the content of bicycloheptene in the cyclic polyolefin resin is greater than or equal to 75%, and the heat distortion temperature is greater than or equal to 127 DEG C. The polyolefin resin composition has good extinction effect and is suitable for packaging materials with high extinction effect requirements.

The invention relates to a thermoplastic composition comprising, based on the weight of the composition, (A) 40 to 70% by weight of an aromatic polycarbonate, (B) 20 to 40% by weight of a polyester, (C) 1 to 15% by weight of an impact modifier, (D) 0.1 to 10% by weight of a hydrolysis stabilizer composition comprising at least one compound containing a diimide function, (E) 0 to 5% by weight of further components, the total amount of (A) to (E) is 100% by weight, and wherein the composition is selected to have a combination of at least 50 kJ / m2 of an initial notched Izod impact, determined according to ISO 180-1A at a temperature of 23 DEG C, at least 70% of a notched Izod impact retention, determined according to the method described in the specification, a heat distortion temperature of at least 90 DEG C as determined according to ISO 75A lay-flat mode under a load of 1.8 MPa.

The invention relates to the technical field of polymer thermoelectric composite materials, in particular to a heat tracing band, which comprises an outer insulating layer, a shielding layer, an inner insulating layer and a conductive core band, and is characterized in that the conductive core band comprises two conductive buses arranged in parallel and a PTC (Positive Temperature Coefficient) composite material coating the conductive buses; the PTC composite material comprises the following components in parts by weight: 180-220 parts of carbon black-carbon fiber composite conductive powder, 600-700 parts of linear low density polyethylene, 50-100 parts of an ethylene-octylene copolymer, 2-4 parts of an antioxidant and 1-3 parts of an ultraviolet light absorber. According to the invention, the ethylene-octene copolymer long-chain branch and the linear low-density polyethylene chain segment are entangled to form a special molecular network; at low temperature, linear low-density polyethylene ensures that the structure is stable, and an ethylene-octylene copolymer flexible chain segment absorbs impact and relieves low-temperature brittleness; at high temperature, the molecular chain of the former is anchored by the long-chain branch of the latter, the sliding of the chain segment is blocked, and a proper amount of balance toughening and heat-resisting agent is added, so that the heat deformation temperature is increased, and the material softening is delayed.

A process for manufacturing a dual-cured polymer component involves the additive manufacturing of a raw component from a liquid photopolymerizable material; and dual post-curing of the raw component by UV curing and thermal curing to form the dual-cured component. The liquid photopolymerizable material has a composition comprising an oligomer with a glass transition temperature above approximately 100 °C, a monomer, and a photoinitiator. The thermal curing step is completed in a nitrogen environment up to a temperature higher than the glass transition temperature of the oligomer. The dual-cured component exhibits a heat deflection temperature between approximately 100 °C and 250 °C and an elongation at break between approximately 5% and 20%.

According to the thermally expandable epoxy sheet molding compound and the production process and application thereof, through synergistic compounding of bisphenol A epoxy resin and methylphenol novolac epoxy resin and optimal combination of loose foaming microspheres and short carbon fibers, the thermal expansion performance and mechanical strength of the material are remarkably improved; the foaming microspheres are uniformly expanded when heated at the temperature of 120 DEG C or above, the volume multiplying power of 3-5 times can be achieved, and the filling requirement of a special-shaped structure is met; the composite use of the short carbon fibers and the glass beads enables the density of a plate product to be reduced to 1.2 g / cm < 3 > or below, which is reduced by 20% or above compared with that of a traditional carbon fiber prepreg, so that the cost of raw materials is effectively reduced; the Tg point of the cured material is greater than 140 DEG C, and the thermal deformation temperature exceeds 150 DEG C, so that the stability of a high-temperature molding process is ensured. In addition, through step-by-step component addition and high-speed shearing and stirring in the kneading process, the problem of non-uniform dispersion of the foaming agent and the resin is solved, and the consistency of the performance of the product is ensured.