995 results about "Engineering plastic" patented technology

The invention relates to a flame-retardant PC material as well as a preparation method and application thereof, and belongs to the technical field of engineering plastics. The flame-retardant PC material provided by the invention is prepared from the following components in parts by weight: 75 to 90 parts of PC resin, 7 to 13 parts of silicon copolymerized PC, 1 to 4 parts of reaction type organic silicon flame retardant, 3 to 8 parts of organic phosphorus flame retardant and 0.1 to 0.2 part of antioxidant, the weight ratio of the silicon copolymerized PC to the reactive organic silicon flame retardant is (2-10): 1. According to the flame-retardant PC material disclosed by the invention, the silicon copolymerized PC, the reactive organic silicon flame retardant and the organic phosphorus flame retardant are compounded, so that a very good flame-retardant synergistic effect can be generated, a molten drop phenomenon of the flame-retardant PC in a combustion process can be effectively controlled, an anti-dripping effect similar to PTFE (Polytetrafluoroethylene) is achieved, and the social demand of no PFAS (Polytetrafluoroethylene Acrylonitrile Butadiene Styrene) is met.

The invention relates to the technical field of computer vision, and discloses an engineering plastic production quality detection method and system. According to the method, an engineering plastic surface image sequence on a production line is collected in real time through an industrial camera, and injection molding machine technological parameters are synchronously obtained. And constructing a ViT-Adapter visual feature extraction network based on a multi-scale sliding window, and fusing surface texture features and process parameters. A defect classification model is trained by adopting a combined loss function of improved Focal Loss and comparative learning, zero sample abnormal segmentation is realized based on WinCLIP, and pixel-level positioning of surface bubbles and scratches is realized. And finally, outputting a defect thermodynamic diagram, and carrying out result visualization in linkage with production line parameter self-adjustment. According to the method, the defect detection accuracy and efficiency are improved, automatic adjustment is realized, manual intervention is reduced, and the production quality and the intelligent level are improved.

The utility model relates to the technical field of engineering plastic processing, and discloses a cutting device for plastic part processing, the cutting device comprises a base, the base is rotatably connected with a workbench through a rotating assembly, the top of the workbench is symmetrically provided with clamping assemblies, and the rotating assembly comprises a rotating motor fixedly installed on the bottom wall of the base; an output shaft of the rotating motor is fixedly connected with a worm, one side of the worm is connected with a worm gear in a meshed mode, and a connecting shaft is fixedly installed in the worm gear. By starting the cross sliding rail and the rotating motor, the rotating motor can drive the worm to rotate, the worm is meshed with the worm gear to push the connecting shaft and the workbench to rotate, the cutting angle of the part is adjusted, the cross sliding rail can push the cutting motor and the cutting blade to move, and the cutting position of the part is adjusted; and parts of different sizes can be cut, and the practicability of the device is improved.

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 relates to the technical field of high polymer materials, in particular to a low-warpage PBT / PC composite modified material and a preparation method thereof. The composite material is prepared from the following raw materials: PBT resin, PC resin, a filler, an ester exchange inhibitor, a flexibilizer, a compatilizer, an antioxidant, a lubricant, a flowable agent and glass fibers. The preparation process comprises the steps of resin drying and mixing, additive premixing, melt blending extrusion and the like, is simple and controllable in flow and is suitable for large-scale production. The composite material prepared by the invention has high strength, high toughness, low warping degree and excellent processability, can be used for ultrasonic welding, reduces after-shrinkage of the material, solves the problem of melt cooling film sticking, and meets the requirements of the market on high-precision and high-stability engineering plastics.

The glass lifter wire wheel cover comprises the wire wheel cover body and the connecting structure arranged on the wire wheel cover body, the connecting structure is connected with a lifter guide rail, the wire wheel cover body and the guide rail are designed in a split mode, the wire wheel cover body is formed by engineering plastic in an injection molding mode, and the influence on the performance strength of the guide rail is avoided; on the premise that the performance strength of the glass lifter is guaranteed, the weight of the guide rail and the weight of the wire wheel cover are reduced, the light weight requirement is met, the invention further provides a wire wheel cover oiling device used for conducting oiling operation on the wire wheel cover of the glass lifter, oiling operation can be conveniently conducted on the wire wheel cover of the glass lifter, and the production efficiency is improved. And subsequent assembling of the wire wheel cover body is facilitated, and the production efficiency of the glass lifter is improved.

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 polyamide composite material as well as a preparation method and application thereof, and relates to the technical field of engineering plastics. The invention provides a polyamide composite material. The polyamide composite material is prepared from the following components in parts by weight: 20 to 80 parts of polyamide resin, 5 to 60 parts of syndiotactic polystyrene, 0.1 to 3 parts of stannous mono-sulphate, 0 to 35 parts of reinforcing filler and 0.05 to 6 parts of compatilizer. According to the polyamide composite material provided by the invention, the syndiotactic polystyrene and the stannous mono-sulphate are cooperated, so that the mechanical property and the heat-resistant stability of the polyamide composite material are further improved.

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 discloses a high-performance color master batch for automobile engineering plastics and a preparation method of the high-performance color master batch, and belongs to the technical field of color master batches. Comprising the following raw materials in parts by weight: 83-95 parts of polypropylene resin, 33-41 parts of linear low-density polyethylene, 12-16 parts of toner, 6-10 parts of an antioxidant, 7-21 parts of an auxiliary agent and 3-5 parts of a lubricant. Wherein polypropylene is used as a main matrix, so that the color master batch is endowed with excellent mechanical strength; in addition, the linear low-density polyethylene added into the raw materials has good flexibility, and the impact resistance of the color master batch can be improved; in addition, molecules of the auxiliary agent contain various functional groups, so that the anti-ultraviolet performance and the flame-retardant performance of the matrix can be remarkably improved; in conclusion, the color master batch prepared by the invention has excellent mechanical properties, ultraviolet resistance and flame retardance, and has important application value in the technical field of color master batches.

The invention discloses a high-performance PEEK composite material and application thereof in a robot skeleton, and belongs to the technical field of special engineering plastics, the PEEK composite material comprises the following components by weight: 50-80 parts of PEEK, 10-20 parts of an elastomer, 15-30 parts of carbon fiber, and 5-10 parts of a compatilizer, monomers 1-4 are copolymerized to obtain a hyperbranched polyaryletherketone copolymer, the hyperbranched polyaryletherketone copolymer is terminated by polysiloxane and modified by maleic anhydride, the monomer 1 is 4, 4 ', 4'-trihydroxy-3, 3 ', 3'-trimethoxytriphenylmethane, the monomer 2 is isopropyl hydroquinone, the monomer 3 is hydroquinone, and the monomer 4 is 4, 4 '-difluorobenzophenone. According to the high-performance PEEK composite material and the application of the high-performance PEEK composite material in the robot skeleton, the self-made compatilizer is added, so that the PEEK and carbon fiber composite material has the characteristics of high strength, good interfacial compatibility, good bending fatigue performance and the like.

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 utility model relates to the related technical field of plastic part processing, in particular to an engineering plastic part grabbing device which comprises a frame body, an adjusting mechanism is arranged on the top of the frame body, and a grabbing mechanism is arranged on one side of the adjusting mechanism. The grabbing mechanism comprises a driving air cylinder, a third driving motor, a first connecting disc, a connecting column, a connecting plate, a threaded column, a clamping arm, a second connecting disc, a movable block, a connecting block and a mounting piece, through the arrangement of the grabbing mechanism, the third driving motor drives the connecting column to rotate, the threaded column is made to move up and down, and then opening and closing of the clamping arm are controlled; the clamping range of the clamping arms can be flexibly adjusted according to plastic parts of different sizes, an adjusting mechanism is embedded in the inner wall of a first sliding groove through one end of a first sliding plate, one side of a second sliding plate is embedded in the inner wall of a second sliding groove, and by means of the design, sliding is more stable when certain pressure is borne; and the risk of grabbing failure or plastic part damage caused by shaking is reduced.

Comfortable and durable outdoor seating The present invention describes a comfortable and durable outdoor seating which is made of polystyrene engineering plastic using blow moulding technology Due to the lightweight material used for making the seating, it can be easily transported to the site of installation after which it is fixed to the ground and optionally its weight is increased by pouring RCC in the side supports. The polystyrene engineering plastic material can sustain extreme environmental conditions. The design is made according to human contour which provides comfort to the person seating and blow moulding technology gives cushioning effect and aesthetic look to the outdoor seating. As the polystyrene is self-coloured, fading of colour is limited. Single seater, two seater or three seater seatings can be designed. Moreover the outdoor seating can also be converted into a swing.

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 a high-toughness modified PPS engineering plastic and a preparation method thereof, and relates to the technical field of engineering plastics. The high-toughness modified PPS engineering plastic is prepared from the following raw materials in parts by weight: 40 to 60 parts of polyphenylene sulfide, 10 to 20 parts of maleic anhydride grafted ethylene-octylene copolymer, 5 to 15 parts of nano calcium carbonate, 10 to 20 parts of modified glass fiber, 0.5 to 2 parts of titanate coupling agent, 0.2 to 1 part of antioxidant 1010, 0.2 to 1 part of antioxidant 168, 0.5 to 2 parts of stearic acid, 0.5 to 2 parts of bisoxazoline and 10 to 20 parts of modified polyphenylene sulfide reinforcement. Through a ternary synergistic modification system and a gradient blending process, the bottleneck that toughness and rigidity of traditional PPS are difficult to consider at the same time is broken through, the preparation process is simple and controllable, the raw material cost is reduced compared with similar high-performance engineering plastics, and the high-performance engineering plastic is suitable for industrial large-scale production.

The invention relates to the technical field of engineering plastics, in particular to a light-transmitting laser-weldable glass fiber reinforced PBT (Polybutylene Terephthalate) material and a preparation method thereof. The glass fiber reinforced PBT material is prepared from the following raw materials in parts by weight: 120 to 140 parts of PBT resin, 20 to 40 parts of PC resin, 30 to 50 parts of glass fiber, 0.01 to 0.02 part of graphene oxide grafted hyperbranched polyamide, 0.2 to 2 parts of silane coupling agent, 0.2 to 2 parts of flowable agent, 0.2 to 2 parts of lubricant, 0.2 to 1 part of antioxidant, 0.5 to 1.5 parts of ester exchange inhibitor and 0.4 to 2 parts of dispersant. The method has the advantage of improving the strength of the laser-weldable PBT material.

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.

According to the high-temperature-resistant tracking master batch provided by the invention, a composite structure is adopted, and the matrix layer is composed of the high-temperature-resistant engineering plastic and the inorganic reinforcing agent and has high temperature resistance and mechanical strength; the functional layer is a tracking unit dispersed in the matrix layer and comprises magnetic nanoparticles and a rare earth fluorescent material, and the interface bonding strength is improved through silanization treatment; the protective layer is a microcapsule formed by coating the tracking unit through a sol-gel method, the thermal expansion coefficient difference between the protective layer and the matrix is less than or equal to 10%, and the rupture rate during melt blending at 320 DEG C is less than or equal to 2%. The preparation method of the tracking master batch comprises the steps of high-temperature extrusion and water-cooling pelletizing. The fluorescence intensity attenuation rate of the tracking master batch is smaller than or equal to 5% at the temperature of 300 DEG C, and the tracking master batch is suitable for full-life-cycle tracking of engineering plastics.

The invention relates to an engineering plastic mold injection high-speed angular contact ball bearing retainer and a lubricating method thereof, and relates to the technical field of high-speed angular contact bearings, the engineering plastic mold injection high-speed angular contact ball bearing retainer comprises a bearing outer ring, a bearing inner ring and a bearing supporting frame, the bearing supporting frame is connected between the bearing outer ring and the bearing inner ring, and the bearing supporting frame is in a hollow circular truncated cone shape; the bearing supporting frame comprises an outer check ring, an outer oil injection ring and an inner connecting groove, the inner connecting groove is formed between the outer check ring and the outer oil injection ring, the connecting position of the outer check ring and the inner connecting groove and the connecting position of the outer oil injection ring and the inner connecting groove are each in an arc shape bent inwards, and multiple sets of ball connecting grooves are formed in the inner connecting groove. The two ends of the ball connecting groove are connected into the outer check ring and the outer oil injection ring respectively, and a ball is connected into the ball connecting groove. Lubricating work can be rapidly completed during oil injection, rapid circulation of lubricating oil can be guaranteed during oil injection, and it can be guaranteed that the lubricating oil is not prone to being thrown out in the using process.

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 relates to the technical field of ABS engineering plastic production, in particular to plastic particle automatic bagging equipment which comprises a rack, a support is fixedly installed on the inner side wall of the rack, a third motor is fixedly installed on the side wall of the support, a ball screw is installed on the support, and the ball screw is connected with an output shaft of the third motor. An axial guide key is arranged on the support in the direction parallel to the axis of the ball screw and horizontally slides along the support. The bag suction mechanism and the axial guide key form sliding constraint through a linear bearing sliding block, and the bag suction mechanism is used for transferring the woven bags from the feeding table to the discharging table; and the top wall of the end, away from the feeding table, in the rack is fixedly provided with the material filling mechanism for filling the woven bags with ABS engineering plastic. The bag opening position of the woven bag is directly adsorbed through the bag adsorption mechanism, after adsorption is completed and lifting rotation is carried out, the horizontally-placed woven bag can be directly converted into the state that the bag opening direction is vertically upward, and the traditional bagging process is optimized.

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 invention discloses an ultra-dispersed flame-retardant engineering plastic master batch and a preparation method thereof, and relates to the technical field of functional plastics. The functional master batch is prepared from the following components in parts by weight: 100 parts of a nylon 6 sheet, 0.5 to 8 parts of a modified carbon nano tube, 5 to 15 parts of diethyl phosphinated ethyl aluminum phosphite, 5 to 15 parts of a flame retardant, 2 to 5 parts of a carbon forming agent, 0.5 to 5 parts of epoxy silicon dioxide and 0.5 to 5 parts of a compatilizer. According to the flame-retardant plastic master batch disclosed by the invention, by introducing the diethyl phosphinated ethyl aluminum phosphite and the flame retardant, a carbon layer and a Schiff base structure are formed on the surface of a material when the plastic master batch is combusted, so that the interaction force between molecular chains of the plastic master batch is improved, the dual properties of flame retardance and molten drop resistance of the plastic master batch are improved, and the problem of fire spreading caused by molten drops is solved.

The present invention provides a core resin composition that exhibits high heat resistance and can be used to produce a core that does not deform even under molding conditions of super engineering plastics. Also provided is a core obtained by using the core resin composition. The present invention is a core resin composition that contains a polyvinyl alcohol resin and has a melt flow rate (MFR) of 35 g / 10 min or less under a load condition of 10 kg at 230°C.