738 results about "Engineering plastic" patented technology

The invention relates to a special engineering plastic polyethersulfone microcellular foam material and a preparation method thereof, belongs to the technical field of high polymer material foaming, and solves the problem that high foaming ratio, a microcellular structure and excellent mechanical properties cannot be simultaneously obtained when a macromolecular polyethersulfone material adopts an injection foaming technology in the prior art. The method comprises the following steps: step 1, pretreating raw materials; 2, melt blending: mixing the PES base material, the second component, the functional filler, the cross-linking agent and the foam stabilizer, carrying out melt blending, granulating, and drying to obtain granules; 3, injection foaming: injecting the granules into an injection machine, adding a composite foaming agent into the injection machine, mixing, and performing injection foaming molding to obtain an injection-molded foaming material; and 4, curing: irradiating the injection-molded foam material with rays to obtain the special engineering plastic PES microcellular foam material.

The invention relates to the technical field of engineering plastic detection, and particularly discloses an aging detection and evaluation method and system suitable for nylon 6 in a marine environment, the system comprises nylon 6 as a core layer, an aging response color-changing material as a surface layer and a middle layer located between the core layer and the surface layer; the thickness of the middle layer is 200-250 [mu] m, and the composite conductive film is transferred to the position 0.2 mm below the surface of the nylon 6 component in a hot pressing mode; the thickness of the surface layer is 0-200 microns and is realized by spraying an aging response color-changing material solution. By integrating the specially designed aging response color-changing material and the conductive film into the nylon 6 matrix, real-time, visual and efficient detection of the aging process is realized. According to the method, the problem that equipment such as a traditional optical fiber spectrometer is complex and expensive is solved, the convenience of field detection is greatly improved through double signal output of color gradient indication and simple electronic reading, and a brand new technical solution is provided for life prediction and preventive maintenance of nylon 6 components in ocean engineering.

The invention provides an antistatic talcum powder and graphene composite reinforced material and an in-situ polymerization process thereof, and belongs to the technical field of polymer composite materials. According to the antistatic talcum powder and graphene composite reinforced material and the in-situ polymerization process thereof, the antistatic talcum powder and graphene composite reinforced material is prepared from the following raw materials in parts by weight: 100 parts of matrix resin, 5-30 parts of modified talcum powder, 0.5-5 parts of functionalized graphene and 0.1-2 parts of an antistatic synergist, the modified talcum powder is subjected to surface treatment by a silane coupling agent, the particle size range is 1-10 [mu] m, and the functionalized graphene is graphene oxide or reduced graphene oxide. Through the synergistic effect of the silane coupling agent modified talcum powder and the functionalized graphene and in combination with the ionic liquid antistatic agent, the surface resistance of the material is remarkably reduced. Nanoscale dispersion is realized by adopting an in-situ polymerization process, and the method is suitable for the field of high-performance engineering plastics.

The invention discloses a single-chain nanoparticle composite reinforced and toughened plastic material and a preparation method thereof, and belongs to the technical field of polymer plastics. The reinforced and toughened plastic material is prepared from the following raw materials in parts by weight: 10 to 20 parts of polymer monomer, 0.004 to 0.005 part of initiator, 0.05 to 0.06 part of chain transfer agent, 8 to 12 parts of solvent and 0.1 to 0.2 part of functional filler, the preparation method specifically comprises the following steps: (1) weighing the raw materials; (2) uniformly mixing the raw materials, and performing nitrogen atmosphere replacement and polymerization reaction; and (3) re-precipitating, and drying in vacuum to obtain the product. The reinforced and toughened plastic material disclosed by the invention not only has excellent performance in the aspect of tensile property, but also shows excellent mechanical response under a bending-resistant load, and is suitable for engineering plastic application scenes with relatively high requirements on structural stability and use safety.

The invention belongs to the technical field of crossing of high polymer materials and artificial intelligence, and discloses a method for optimizing the proportion of a nano-composite flame-retardant master batch in engineering plastic based on machine learning. The method is used for solving the problems that a traditional experience trial and error method is low in efficiency in multi-target performance collaborative optimization, high-dimensional nonlinear parameter space search is difficult, and microscopic coupling effect modeling is missing. According to the method, a multi-dimensional input feature set containing material composition and process parameters is constructed, six key performance indexes are combined to form training data, a mixed model formed by cascading a multi-layer perceptron and Gaussian process regression is trained, an improved non-dominated sorting genetic algorithm (NSGA-II) is adopted for multi-target global optimization, and an optimal ratio meeting preset constraints is obtained. The method is an industrial internet technology system service, and solves the technical problem that multi-target performance is difficult to collaboratively optimize due to the fact that a traditional experience trial-and-error method cannot perform modeling and searching on a high-dimensional nonlinear parameter space of a nano-composite flame-retardant system.

The invention belongs to the technical field of cable installation equipment, and particularly relates to a composite cable insulation fixing device which comprises a fixing device, a cable installation device and a compensation device. The fixing device comprises a fixing base and a fixing column; the fixed column is mounted on the fixed base, and the cable mounting device is horizontally mounted on the fixed column; the cable mounting device comprises a horizontal rod, a vertical rod and a fixing clamp; a vertical rod is mounted at the position, close to the mounting table, of the horizontal rod; the horizontal rods are sleeved with fixing clamps and limiting sleeves, and the limiting sleeves are arranged between the adjacent fixing clamps. The fixing clamp is an I-shaped component, a cable groove which is sunken downwards is formed in the middle of the fixing clamp, and a cable is laid in the cable groove. According to the scheme, a multi-dimensional fixing structure is provided, and the cable fixing stability is greatly improved; the fixing clamp is made of a special engineering plastic material, the weight is reduced, meanwhile, the good insulation effect is achieved, and the fixing clamp is especially suitable for medium-and-low-voltage cables or communication cables.

The invention relates to the technical field of mechanical parts, and discloses a high-bearing engineering plastic worm gear applied to a light truck electric power steering system and a manufacturing process, and the manufacturing process comprises the following steps: pretreatment of a polymer base material, preparation of a composite reinforcing material, preparation of an injection molding raw material, precise injection molding, post-treatment and detection. After a polymer base material is subjected to fluorination activation treatment, the surface energy of the material is reduced, the interfacial compatibility with a composite reinforced material is enhanced, and through the synergistic effect of chemical bonding and physical anchoring formed between matrix resin and a modified reinforcement body, the interfacial layering tendency of engineering plastic and a fiber reinforced phase is overcome, so that stress transmission is more uniform; meanwhile, the functional additive components generate an in-situ synergistic effect in the precise injection molding process, and form a multi-stage enhanced network with matrix resin, so that the worm wheel matrix is endowed with excellent overall bearing strength and fatigue fracture resistance, and the structural integrity under the working conditions of high load and high-frequency steering is ensured.

The invention relates to a microporous nano foam material with a micro-nano pore structure as well as a preparation method and application thereof, and belongs to the technical field of foam materials. According to the invention, a micro-cross-linked network is taken as a core, and the problem of insufficient melt strength caused by disentanglement of molecular chains in a high-temperature processing and forming process of the hydroxyl-terminated polymer is solved through a multi-network (a cross-linked structure, a chain extension structure and a branched chain structure) structure. The preparation method comprises the following steps: firstly, preparing a high-performance microporous nano foaming material with a micro-nano pore structure by using a high-pressure foaming technology and then carrying out supercritical forming by using a supercritical foaming technology, so that the problem that all special engineering plastics containing terminal hydroxyl groups are difficult to foam due to rigid chain structures can be solved, and finally, high-frequency high-speed high-performance antennas which are used for 5G and 6G are obtained.

The invention provides a heat-conducting and electromagnetic-shielding composite functional master batch as well as a preparation method and application thereof. The heat conduction / electromagnetic shielding composite functional master batch comprises engineering plastic, heat conduction electromagnetic shielding filler and a toughening agent, and the heat conduction electromagnetic shielding filler comprises heat conduction resistance type electromagnetic shielding filler and heat conduction magnetic loss type electromagnetic shielding filler, the heat-conducting resistance type electromagnetic shielding filler comprises a one-dimensional carbon filler and a two-dimensional carbon filler, and comprises engineering plastic, a flexibilizer and a heat-conducting electromagnetic shielding filler. Under the action of the composite force field module under the combined action of stretching and shearing, uniform dispersion of the engineering plastic and the functional filler is realized, and synchronous improvement of heat conduction and electromagnetic shielding performance of the engineering plastic is realized.

The invention discloses an intelligent feeding control method based on ingestion behavior recognition, a device comprises a shell and machine body module, a storage area module, a feeding regulation and execution module and a control and interaction system module, the shell and machine body module comprises a front shell, a rear shell and an external fixing support, the shell is cuboid and is made of anti-corrosion ABS engineering plastics, and the front shell and the rear shell are connected with the control and interaction system module. The system comprises a material storage area module and a material feeding control and execution module, the material storage area module comprises a cylindrical material storage barrel and a lower funnel, the material feeding control and execution module comprises a material feeding port control unit, a weight detection unit and a bait conveying unit, a closed loop structure of adjusting, weighing and conveying is formed, and the control and interaction system module comprises a Raspberry Pi main control board, a ULN2003 motor driving module and an OLED display interface. Through feeding recognition, intelligent control and closed-loop adjustment, accurate feeding is achieved, bait waste is reduced, water pollution is reduced, and the device is compact in structure, flexible to install, suitable for various breeding scenes and high in popularization value.

The invention relates to the technical field of engineering plastic treatment equipment, and discloses an engineering plastic building material recovery treatment device which comprises a bidirectional crushing mechanism and a bidirectional linkage mechanism. A first bevel gear capable of driving the lower crushing roller to rotate, a second bevel gear capable of driving the upper crushing roller to rotate and a third bevel gear capable of rotating along with a rotor of the driving motor and driving the first bevel gear and the second bevel gear to rotate are arranged in the driving motor. According to the engineering plastic building material recycling and processing device, collision type crushing on waste plastic on the periphery of the same axis is achieved through a single driving source, so that the effective crushing area of the plastic is increased, in addition, the two crushing rollers of the device can operate in the opposite directions, and the crushing efficiency of the plastic is improved.

The invention provides a modified engineering plastic melt index real-time monitoring method which comprises the following steps: determining a melt index difference value of adjacent monitoring points by acquiring a melt index value of each section of an extrusion production line; obtaining the number of shearing cycles of the extrusion production line, identifying the fiber shearing damage degree of each section according to the melt index difference and the number of shearing cycles to obtain fiber damage distribution, and determining the fiber fracture position according to the fiber damage distribution; the melt index difference value corresponding to the fiber fracture position is analyzed by obtaining the melt index of the fiber fracture position, and the monitoring point interval is dynamically adjusted through the melt index difference value; and obtaining the melt index value and the fiber shortening amplitude after the interval adjustment of the monitoring points, and comparing the melt index change and the fiber length loss of each monitoring point to obtain the corresponding distribution of the fiber shortening amplitude and the melt index value.

The invention particularly relates to an AES engineering plastic 3D printing consumable and a preparation method thereof. The 3D printing consumable is prepared from the following raw materials in parts by weight: 60 to 70 parts of AES resin, 10 to 15 parts of siloxane copolymerized polycarbonate, 8 to 12 parts of acrylic modified silicon resin, 8 to 12 parts of compatilizer, 5 to 15 parts of flame retardant, 4 to 10 parts of inorganic filler, 1 to 3 parts of silane coupling agent, 0.5 to 5 parts of antioxidant and 0.5 to 5 parts of functional additive. The AES engineering plastic 3D printing consumable material is prepared through the synergistic effect of the AES resin, the siloxane copolymerized polycarbonate, the acrylic acid modified silicon resin, the compatilizer, the flame retardant and other raw materials, has good printing precision, interlayer binding force and heat resistance, and can meet the requirements of 3D printing of high-precision and high-strength parts. The preparation method is stable in process, convenient to operate and control, high in production efficiency and beneficial to industrial production.

The utility model relates to a corrosion-resistant electromagnetic flowmeter. Two ends of the measuring pipeline are respectively provided with a left-end flange and a right-end flange, the measuring pipeline, the left-end flange and the right-end flange are made of engineering plastics and are of an integrated injection molding structure, and an upper measuring electrode and a lower measuring electrode which are longitudinally opposite are arranged in the middle of the top wall and the middle of the bottom wall of the measuring pipeline; the device further comprises a front shell and a rear shell which clamp the measuring pipeline in the middle, coil supports are arranged in the front shell and the rear shell, excitation coils are installed on the coil supports, and the two excitation coils are located in front of the middle of the measuring pipeline and behind the middle of the measuring pipeline respectively. A front half flange plate is arranged at the top of the front shell, a rear half flange plate is arranged at the top of the rear shell, the front half flange plate and the rear half flange plate form a top flange when the front shell and the rear shell are assembled in a butt joint mode, the gauge head is provided with a display screen in the front and a gauge head support at the bottom, and the bottom of the gauge head support is fixedly connected with the top flange. According to the corrosion-resistant electromagnetic flowmeter, the corrosion-resistant capacity is improved on the basis that the structural characteristics of the flowmeter body are guaranteed.

The invention relates to the technical field of modified composite materials, in particular to a polyamide-imide polymer, a preparation method of the polyamide-imide polymer, a sizing agent, a fiber-reinforced special engineering composite material and a preparation method of the fiber-reinforced special engineering composite material. The polyamide-imide polymer is formed by polymerizing a first monomer and a second monomer, and the first monomer is an aryl polyanhydride monomer; the second monomer is a diamine monomer or a diisocyanate monomer. The polyamide-imide polymer is used as a sizing agent to compound the fiber material and the special engineering plastic, so that the defects of the carbon fiber in spreadability, compatibility with a resin matrix, heat resistance, interface performance and the like can be overcome and enhanced, and the matching enhancement of other inorganic fibers can be realized; the interface multifunctional modification performance optimization of the carbon fiber reinforced high-performance thermoplastic resin matrix composite material is realized.

The invention discloses a flame-retardant polymer, a preparation method thereof and application of the flame-retardant polymer in preparation of a flame retardant. The invention relates to a flame-retardant polymer, the flame-retardant polymer has a structure as shown in formula I. In the formula I, R1 is selected from one of phenyl and phenoxy; r2 is selected from one of methyl and phenyl; r3 is selected from one of methyl and phenyl; r4 is selected from one of tertiary butyl and methyl; r5 is selected from one of methyl and phenyl, the value ranges of n1 and n2 are both 0-20, and the value range of n1 + n2 is 0-40. Through molecular modification and design, the flame-retardant polymer has better compatibility with PC resin and PC / ABS engineering plastic, and compared with a traditional phosphate flame retardant, the flame-retardant polymer can improve and reduce the physical performance and weather resistance of the flame-retardant polymer.

The invention relates to a quick connector and a production mold thereof, and relates to the technical field of mechanical engineering, and the quick connector comprises a first pipeline, a second pipeline and a connecting shell made of an engineering plastic material. The corrosion resistance is improved through the connecting shell made of the engineering plastic, the connecting shell is made of the engineering plastic, a metal hoop in the prior art is replaced, and the problem of metal corrosion is solved from the material level. The hoop directly wraps the connecting end of a pipeline, does not need to be exposed to the external environment, can resist erosion of water vapor and corrosive media for a long time, ensures the stability of a connecting structure, and solves the problems of clamping force attenuation and leakage hidden danger caused by corrosion of a traditional metal hoop. Tool-free rapid operation is achieved through the limiting mechanism, and through the synergistic effect of a limiting sliding rod, a first spring and a first ball, when the connecting shell is pulled upwards, constraint of an annular limiting hole to the first ball is relieved, the first spring rebounds to drive the limiting sliding rod to be away from the second pipeline, and pipeline insertion is facilitated.

The invention belongs to the field of high polymer material synthesis, and provides a method for preparing polyphenylene sulfide from high-purity p-dichlorobenzene, which adopts the whole process design of pre-construction of a composite sulfur source intermediate, regulation and control of an end group controllable oligomerization polyphenylene sulfide intermediate, segmented polymerization of the high-purity p-dichlorobenzene and precise dehydration-washing-drying. The ultra-low impurity level of 0.05-0.25 wt% of burning residues of the polyphenylene sulfide product, the sodium ion content of 10-200 mg / kg and the chloride ion content of 10-500 mg / kg is achieved, and meanwhile the high-performance stability of the melting point of 270-300 DEG C, the gel fraction of 92-99 wt% and the water content of 0.01-0.20 wt% is kept. The problems of deep removal of inorganic ions and ash content, balance of gel fraction and processability and control of residual solvents in the traditional polyphenylene sulfide preparation process are solved, and the method has wide application value in the fields of high-performance engineering plastics, special fibers, electronic packaging materials and the like.

The invention discloses a multi-material composite injection molding method and system, and the method comprises the steps: carrying out laser surface etching on a continuous fiber reinforced substrate to form a microgroove array, and spraying an activator to generate an activated fiber preform; performing infrared partition heating on the marginal area, constructing a temperature gradient field, positioning the marginal area to a mold cavity, injecting engineering plastic melt into a mold, synchronously collecting mold vibration frequency spectrum and infrared thermal imaging data, establishing a mapping relation between vibration dominant frequency characteristics and temperature gradient values, and dynamically regulating and controlling injection molding pressure and pressure maintaining switching time. A foaming elastomer material is injected into a reserved groove position of the matrix-fiber composite blank, a self-foaming reaction is triggered through blank waste heat, and a composite structural part is generated; based on vibration frequency spectrum and infrared thermal imaging data continuously collected in the injection molding process, the process health index is calculated, the product qualification is judged, control over a multi-material interface is achieved by fusing infrared thermal imaging, and efficient and low-consumption production is achieved while the composite strength and the sealing performance are improved.

The utility model discloses a convenient-to-adjust high-performance engineering plastic compressive impact resistance detection device, which comprises a mounting seat, a counterweight adjusting mechanism and a height adjusting mechanism, and is characterized in that the upper end of the front side of the mounting seat is rotatably connected with an upper swing arm, the lower end of the interior of the upper swing arm is slidably connected with a lower swing arm, and the middle of the interior of the lower swing arm is provided with a mounting groove; the counterweight adjusting mechanism comprises counterweight blocks, limiting grooves, gears and limiting blocks, the counterweight blocks are clamped in the guide grooves, the limiting grooves are formed in the right ends of the front and rear side walls of the counterweight blocks, and the three gears are rotationally connected to the interior of the mounting groove; the convenient-to-adjust high-performance engineering plastic compressive impact resistance detection device is provided with the pendulum bob capable of being rapidly adjusted, the falling speed can be adjusted by increasing or decreasing the balancing weights and rapidly fixing the balancing weights, and the falling speed and height can be rapidly adjusted by rotating the hand wheel and moving the sample seat.

The invention discloses a PPE / PPS (polyphenylene sulfide) composition and a preparation method thereof. The composition is prepared from the following components in percentage by weight: 35-45% of PPE resin, 20-30% of PPS resin, 15-30% of glass fiber, 2-15% of inorganic filler, 1-5% of compatilizer, 2-10% of fluidity improver and 0.6-1.5% of other auxiliaries. According to the invention, the contradiction between high flowability and high heat resistance as well as high rigidity and low warpage generally faced by high-filling engineering plastics is solved, and the high-filling engineering plastics are very suitable for the frontier fields with extremely high performance requirements, such as 5G mobile phone middle frames, millimeter wave radar radomes, new energy automobile IGBT module heat dissipation cover plates and the like, and have wide market application prospects.

The invention discloses a hydrolysis-resistant PBT reinforced material capable of being subjected to laser welding and a preparation method of the hydrolysis-resistant PBT reinforced material, and belongs to the field of engineering plastics. Comprising the following raw materials in parts by mass: 45-70 parts of PBT resin, 0.5-1 part of a nucleating agent, 0.5-1 part of a nucleating auxiliary agent, 0.1-1 part of an antioxidant, 0.1-1 part of a lubricant, 0.2-0.8 part of a hydrolysis-resistant agent, 1-3 parts of a toughening agent and 25-45 parts of glass fibers, the nucleating auxiliary agent is sodium-doped potassium aluminosilicate. The nucleating agent can improve the crystallization rate of PBT, refine the grain size and reduce light scattering, and the hydrolysis-resistant agent can block autocatalytic hydrolysis circulation. And the composite sodium-doped potassium aluminosilicate not only can provide a large number of sites for PBT nucleation, but also can adsorb and capture water molecules in the environment and small molecules in an adsorption material and reduce hydrolysis reaction, so that the reinforced PBT material can be suitable for laser welding, and the long-term stability of the material in a high-temperature and humid environment can be guaranteed.

An environmentally friendly, wear-resistant and noise-reducing engineering plastic composition, a preparation method therefor and a use thereof. The composition comprises the following components: a thermoplastic resin, a reinforcing filler, a wear-resistant and noise-reducing auxiliary agent, a wear-resistant auxiliary agent, and other auxiliary agents. The wear-resistant and noise-reducing auxiliary agent comprises at least one of a polyolefin-styrene graft copolymer or a polyolefin-styrene graft copolymer modified with a reactive functional group. The wear-resistant auxiliary agent is selected from among one of UHMWPE, polysiloxane, molybdenum disulfide, graphite, and a modified fatty acid ester. The reinforcing filler comprises at least one of fiberglass, carbon fibers, and an inorganic mineral. The wear-resistant and noise-reducing auxiliary agent and the wear-resistant auxiliary agent are used in combination, so that the wear resistance and noise reduction performance of the modified engineering plastic can be significantly improved, the composition is environmentally friendly, and the mechanical properties of the modified material can be maintained.

The reclosing circuit breaker comprises an electric operation mechanism and an operation mechanism, the electric operation mechanism is provided with an output gear and a connecting rod, one end of the connecting rod is connected with the output gear, and the connection position deviates from the rotation center of the output gear; wherein the operating mechanism comprises a handle, and the handle is made of engineering plastics; a driving column and a limiting part are integrally formed on the handle through injection molding; a linkage hole is formed in the other end of the connecting rod, the driving column is sleeved with the linkage hole, and along with rotation of the electrolytic bath mechanism, the connecting rod acts on the driving column through the hole wall of the linkage hole so as to drive the operating mechanism; the limiting part is positioned above the driving column so as to prevent the driving hole from being separated from matching with the driving column; the handle has the advantage that the handle is not prone to being broken down.

The invention provides self-made small five-axis numerical control machine tool teaching equipment and an operation method thereof, and relates to the technical field of numerical control machining teaching equipment. A main shaft system and a clamp are arranged on the five-axis movement system; a transparent safety protection cover is arranged on the peripheral side of the five-axis movement system in a covering manner; a plurality of cameras are arranged on the five-axis movement system or the safety protection cover; the control system is respectively connected with the plurality of cameras, the main shaft system, the clamp and the five-axis movement system; according to the invention, an open modular structure is adopted, key moving parts and a processing process are completely exposed or visible through the transparent protective cover, so that a teacher can explain step by step and observe at a short distance with students; the machine tool body is made of light-weight materials such as aluminum alloy or engineering plastics, an open source numerical control system and standardized electromechanical components are combined, and on the premise that the basic teaching function is guaranteed, the manufacturing cost and maintenance complexity of equipment are greatly reduced.

The utility model discloses an electrical engineering plastic line pipe lead device, and relates to the technical field of line pipe lead equipment. The lead comprises a base and a lead body, and a driving assembly is arranged on the base. According to the utility model, when a lead body is inserted, the connection driving sleeve is pulled out between the lead reel and the driving assembly, the two groups of rubber wheels are close to each other through the opening and closing assembly, the lead body is clamped between the rubber wheels, and the second motor drives the rotating shaft to drive the rubber wheels to rotate; therefore, the lead body can smoothly penetrate into the electrical engineering plastic line pipe, and the lead penetrating efficiency is improved. The surface of the rubber wheel is provided with the V-shaped arc-shaped groove and the anti-skid patterns, the V-shaped arc-shaped groove can be matched with the lead bodies of different diameters, the friction force between the rubber wheel and the lead bodies is increased through the anti-skid patterns, the stability and reliability of the lead bodies in the transmission process are ensured, and the compatibility of the device to the lead bodies of different specifications is enhanced.

The invention discloses an engineering plastic performance prediction method, and relates to the field of data processing. The method comprises the following steps: reading basic elements of pre-test engineering plastic; determining a first performance prediction result in combination with the intelligent derivation model; interacting multiple application scenes of the pretest engineering plastic, and determining a second performance prediction result; based on a controllable deviation range, performing mutual inspection on the first performance prediction result and the second performance prediction result, and determining an effective inspection result; and if the effective test result is yes, carrying out mean value processing, and taking the result as a performance prediction result. By the adoption of the method, the technical problem that in the prior art, due to the fact that performance prediction of engineering plastics is carried out under specific conditions, actual conditions are not fully considered, and prediction result errors are large is solved, performance prediction is carried out in a finite element reasoning and multi-scene joint simulation test mode, the prediction results are mutually verified, and the performance prediction accuracy is improved. And a prediction result with higher precision is obtained.

Disclosed is a heater assembly for accommodating and heating an aerosol generating article, the heater assembly including: an accommodation portion configured to accommodate an end portion of an aerosol generating article; a heating portion arranged to surround another portion of the aerosol generating article; and a combining portion configured to combine the accommodation portion and the heating portion and including engineering plastic, wherein the accommodation portion, the combining portion, and the heating portion are arranged along a longitudinal direction of the aerosol generating article and form an accommodation space in which the aerosol generating article is accommodated.

This invention discloses a high-transmittance ethylene copolymer and its applications. In this copolymer, the molar content of the second olefin X is 1.8-9.9 mol%, and the second olefin X is an olefin with more than 4 carbon atoms and an odd number of carbon atoms. The molar content of the [EXX] segment is 0.1-5.0 mol% of the total ternary segment content, the molar content of the [EEE] segment is 70-90 mol%, the molar content of the [EXE] segment is 2.0-8.0 mol%, the molar content of the [XEE] segment is 0.5-3.0 mol%, and the molar content of the [XEX] segment is 3.5-10.0 mol%. In this copolymer, when the molar content of the [EXX] segment reaches 0.15 mol%, the transmittance of the copolymer film after hot pressing is not less than 90%, exhibiting extremely high atom economy of the second olefin X. This copolymer can be applied in photovoltaic films, toughening of polyolefin materials, wire and cable, and modification of engineering plastics.

The invention relates to the technical field of polymer composite material preparation, in particular to a super-tough core-shell stereocomplex polylactic acid-based composite material and a preparation method thereof. The super-tough core-shell stereocomplex polylactic acid-based composite material is prepared from the following raw materials in parts by mass: 70 to 100 parts of polylactic acid and 0 to 30 parts of the modified elastomer in claim 4, and the dosage of the modified elastomer is not 0; the modified elastomer is prepared by melting and blending stereocomplex polylactic acid powder and a functional elastomer copolymer; the stereocomplex polylactic acid powder is prepared by reactive melt blending of PLLA and PDLA in an equal mass ratio or an equal molar ratio. The prepared super-tough core-shell stereocomplex polylactic acid-based composite material has excellent tensile strength and impact resistance, can be applied to the field of engineering plastics such as automobile parts, electronic and electric appliance shells, household products, catering tableware and the like, and has remarkable environmental protection benefits and industrial popularization value.