962 results about "Extrusion Granulation" patented technology

The invention discloses a degradable bamboo fiber express packaging bag and a preparation method thereof, and belongs to the technical field of express packaging. The packaging bag is prepared from, by mass, 32-42 parts of pretreated bamboo fibers, 22-28 parts of poly (butylene succinate), 9-14 parts of modified nano calcium carbonate, 12-16 parts of polycaprolactone, 6-11 parts of acetylated chitosan and the like, and the key raw materials are all treated through an exclusive pretreatment or modification process. The preparation method comprises the steps of raw material plasma activation, segmented high-speed mixing, vacuum drying, precise-parameter twin-screw extrusion granulation, secondary drying, precise film blowing, high-precision heat-sealing bag making and the like, and the technological parameters of all the steps are clear. The product disclosed by the invention can be efficiently degraded in a natural environment, has excellent tensile resistance, puncture resistance and impact resistance, is stable and controllable in processing process, and is adaptive to actual requirements of express packaging and industrial batch production.

The invention discloses a high-weather-resistance halogen-free flame-retardant polyamide composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The composite material comprises the following raw materials in parts by weight: 20-60 parts of polyamide resin A, 0-20 parts of polyamide resin B, 10-50 parts of glass fibers, 0.1-2 parts of an ultraviolet absorbent, 0.1-2 parts of a free radical scavenger, 10-20 parts of a halogen-free flame retardant, 1-15 parts of a flame retardant synergist and 0.5-5 parts of a conventional auxiliary agent. The preparation method comprises the following steps: uniformly mixing the polyamide resin A, the polyamide resin B, the ultraviolet absorbent, the free radical scavenger, the flame-retardant synergist and the conventional auxiliary agent in a high-speed mixer according to the proportion to obtain a mixture, then adding the mixture into a double-screw extruder through main feeding, side feeding of the halogen-free flame retardant through a first side feeding and side feeding of the glass fiber through a second side feeding, and carrying out extrusion molding to obtain the flame-retardant polyamide composite material. And carrying out melt blending and extrusion granulation to obtain the high-weather-resistance halogen-free flame-retardant polyamide composite material. The obtained high-weather-resistance halogen-free flame-retardant glass fiber reinforced polyamide composite material is excellent in mechanical property, flame retardance and weather resistance.

The invention discloses a biodegradable polylactic acid composite material and a preparation method thereof, and relates to the technical field of polylactic acid materials. The method comprises the steps that firstly, chitosan activated through hydrochloric acid is subjected to graft modification through a KH550 silane coupling agent, meanwhile, nano-zinc oxide is subjected to surface modification through stearic acid, the chitosan and the nano-zinc oxide are mixed, spray drying is conducted, and antibacterial composite powder is prepared; the preparation method comprises the following steps: performing hydrochloric acid activation and KH570 silane coupling agent modification on nano silicon dioxide, performing hydroxypropylation modification on alkali lignin, and performing reflux crosslinking reaction on the modified alkali lignin, KH570 modified nano silicon dioxide, polycaprolactone, methyl methacrylate and azodiisobutyronitrile to prepare a heat-resistant reinforcer; uniformly mixing polylactic acid, poly (butylene succinate), the antibacterial composite powder, the heat-resistant reinforcer, tributyl citrate, polyethylene glycol and talcum powder, and extruding and granulating by using a twin-screw extruder to obtain the heat-resistant antibacterial material. The composite material prepared by the invention has excellent antibacterial property, heat resistance and biodegradability.

The invention relates to a production system and a production method of a polyhydroxyalkanoate paper-plastic composite material. The production system comprises an unwinding mechanism, a coating device, a drying device, a pressing device, a winding mechanism and a post-processing device, wherein the unwinding mechanism is used for conveying base material paper; the coating device is used for coating the base material paper conveyed out by the unwinding mechanism and comprises an extrusion type coating machine head; the drying device is used for heating and drying the coated base material paper; the pressing device is used for pressing the dried base material paper; the winding mechanism is used for storing the laminated base material paper; and the post-processing device is used for performing post-processing on the laminated base material paper, and the post-processing device comprises an elastic roll mechanism and a drying box. According to the preparation method, an extrusion type coating process is adopted, extrusion granulation, high-temperature melt extrusion casting or film spraying forming of the polyhydroxyalkanoate is not needed, the degradation risk of the polyhydroxyalkanoate is avoided, degradation of the polyhydroxyalkanoate is reduced, and the production cost is reduced.

The invention discloses a polyamide composition and a preparation method thereof, and belongs to the field of high polymer materials. The method comprises the following steps: uniformly mixing the polyamide resin, the flexibilizer, the coupling agent, the antioxidant and the lubricant, and adding the mixture into a double-screw extruder from a main feeding hopper; adding the hollow glass beads into a double-screw extruder from a side feeding hopper close to a main feeder, and adding glass fibers into the double-screw extruder from a side feeding hopper close to a machine head; the polyamide composition is prepared through melt blending, extrusion granulation, homogenization and drying; by adjusting the blanking sequence of the hollow glass beads and the conventional glass fibers, controlling the rotating speed of a screw rod and the feeding of an extruder, firstly combining the hollow glass beads with matrix resin containing a compatilizer and then adding the glass fibers, the shearing force borne by the hollow glass beads in the resin is reduced, and the glass fibers are uniformly dispersed in the matrix resin. The retention rate of the hollow glass beads in the polyamide is improved, so that the purpose of remarkably reducing the density of the material is achieved.

The invention relates to the technical field of environment-friendly materials, and discloses a high-strength degradable packaging material and application of the high-strength degradable packaging material in cosmetic packaging materials.The preparation method of the high-strength degradable packaging material comprises the steps that polylactic acid, vanillic aldehyde modified polyester, polyadipic acid, triethyl citrate, calcium stearate and an antioxidant are added into a high-speed mixing machine, and the mixture is stirred to be uniform; mixing at 60 to 80 DEG C for 10 to 20 minutes to obtain a mixed material; the mixed material is subjected to melt blending through a double-screw extruder, the blending temperature is 160-180 DEG C, the screw rotating speed is 250-300 rpm, extrusion granulation and drying are conducted, and the high-strength degradable packaging material is obtained. The high-strength degradable packaging material can be applied to cosmetic packaging materials such as bottle bodies, bottle caps, hoses and packaging boxes. The prepared packaging material is high in mechanical strength and has good degradability and flame retardance.

The invention relates to the technical field of polymer composite materials, and discloses a refining treatment method of a bamboo fiber ultra-nano micro powder and natural polymer blended material, which comprises the following steps: (a) premixing bamboo fiber ultra-nano micro powder and a deep eutectic solvent to obtain a premix and realize in-situ activation; (b) adding the premix and a natural polymer matrix from a main feed port of a double-screw extruder; and (c) in the melt blending process, adding a dynamic interface locking agent through a side feeding port arranged at the downstream of the main feeding port, and then extruding and granulating. A staged dynamic compatibilization process is adopted, a hydrogen bond network of bamboo fibers is destroyed by using a deep eutectic solvent to promote shearing dispersion of the bamboo fibers in the front section, and stable interface bonding is constructed in the rear section through a dynamic interface locking agent after dispersion is completed. The method synergistically solves the conflict between dispersion and interfacial compatibilization, so that the composite material has good comprehensive performance.

The invention discloses a preparation method of a nano silicon dioxide modified high-density polyethylene wear-resistant plate, and belongs to the technical field of polyethylene plates, the method comprises the following steps: firstly preparing an antioxidant PMMA microcapsule, then preparing titanium dioxide and silicon dioxide, and modifying by KH550 to obtain modified nano titanium-silicon composite particles; then, an antioxidant coated PMMA microcapsule, the modified nano titanium-silicon composite particles, POE-g-MAH and HDPE particles are premixed, and the wear-resistant plate is obtained through twin-screw extrusion granulation and pulsating force field assisted molding; through the synergistic effect of the antioxidant coated PMMA microcapsule, the modified nano titanium-silicon composite particles and the compatilizer POE-g-MAH, the problems that the wear resistance of the HDPE plate is insufficient and the antioxidant is easily adsorbed by nano silicon dioxide to cause aging resistance attenuation are solved, and the wear resistance, thermal oxidation / light aging resistance and mechanical property improvement of the plate are realized; and the requirements of high-frequency wear scenes such as mine conveying and outdoor engineering can be met.

The invention relates to the technical field of wire and cable materials, and discloses a high-temperature-resistant and aging-resistant wire and cable material and a preparation method thereof.The high-temperature-resistant and aging-resistant wire and cable material is prepared from, by weight, modified polyetherimide, silane modified polyolefin, organic montmorillonite, surface modified nanometer aluminum oxide and surface functionalized graphene, an antioxidant, a silane coupling agent and a processing lubricant; the preparation method of the high-temperature-resistant and aging-resistant wire and cable material comprises the following steps: weighing and preparing raw materials; carrying out surface modification treatment on the nanofiller; drying the raw materials; premixing the components; reacting, extruding and granulating; and cooling, bracing and dicing. By adopting the technical scheme of synergistic application of the surface functionalized graphene and the silane modified polyolefin, the technical effect of remarkably improving the thermal stability and the mechanical property of the composite material is achieved, the problem that the performance of a traditional scheme is unstable at high temperature is solved, and the phenomena of filler agglomeration and material degradation are avoided.

The invention relates to a heat-conducting insulating cable material and a preparation method thereof, and belongs to the technical field of cable materials, the heat-conducting insulating cable material comprises the following raw materials: 50-60 parts of polypropylene, 25-30 parts of SEBS, 12-18 parts of a modified heat-conducting insulating material, 2-4 parts of a plasticizer, 6-8 parts of an antioxidant, 3-4 parts of a lubricant and 7-10 parts of a reinforcing filler; according to the technical scheme, modified hydroxylated boron nitride is combined with organic intercalated montmorillonite, then a silane coupling agent is grafted, and a silanization reinforced material is obtained; combining the silanization reinforcing material with a branched functional monomer to obtain an amino-terminated hyperbranched composite material; combining the amino-terminated hyperbranched composite material with an interface modifier to obtain a modified heat-conducting insulating material; mixing polypropylene, SEBS, the modified heat-conducting insulating material, a plasticizer, an antioxidant, a lubricant and a reinforcing filler, and performing extrusion granulation to obtain the heat-conducting insulating cable material. The mechanical property, the heat-conducting property and the insulating property of the cable material are improved.

The invention belongs to the technical field of high polymer materials, and particularly relates to a PET decorative film and a preparation method thereof. The preparation method comprises the following steps: synthesizing hydroxyl-terminated hyperbranched polyester by taking pentaerythritol and 2, 2-dimethylolpropionic acid as raw materials, and reacting with polyol glycidyl ether to prepare an epoxy-terminated organic modifier; silver-loaded nano silicon dioxide subjected to surface treatment by an amino silane coupling agent is used as inorganic functional particles; pET resin, an organic modifier and inorganic functional particles are subjected to melt blending and extrusion granulation, and modified PET is prepared; the modified PET is prepared into the film through a two-way stretching process. Epoxy groups of the organic modifier chemically react with amino groups at the tail end of a PET molecular chain and on the surfaces of inorganic particles respectively, a stable organic-inorganic hybrid network is constructed, synergistic improvement of reinforcement, toughening and long-acting antibiosis is achieved, and the technical problems that functional particles are not uniform in dispersion, interface bonding is weak, and antibacterial components are prone to migration are effectively solved.

The invention discloses a polyethylene composite geomembrane and a processing technology thereof in the field of geosynthetic materials. The polyethylene composite geomembrane is prepared from the following raw materials: high-density polyethylene, polyethylene grafted maleic anhydride, a nano montmorillonite / low-density polyethylene composite modifier, an antioxidant, a light stabilizer and a lubricant calcium stearate. Wherein the polyethylene grafted maleic anhydride is prepared by drying high-density polyethylene, mixing the dried high-density polyethylene with maleic anhydride, an initiator and an antioxidant, and performing melt extrusion through a double-screw extruder, so that the surface polarity is improved; the nano-montmorillonite / low-density polyethylene composite modifier is prepared by ultrasonically dispersing Na-montmorillonite, adding hexadecyl trimethyl ammonium bromide, stirring, centrifugally drying to obtain organic modified montmorillonite, mixing the organic modified montmorillonite with low-density polyethylene, performing intercalation reaction, and performing twin-screw extrusion and blending, so that the barrier property is enhanced. The processing technology comprises the steps of raw material mixing, twin-screw extrusion granulation and calendaring molding, and finally the polyethylene composite geomembrane with remarkably improved interface cohesiveness, weather resistance and barrier property is prepared.

The invention discloses an automotive polypropylene material with good appearance and easy paint spraying and a preparation method thereof, and belongs to the technical field of high polymer materials. The polypropylene material is prepared from the following raw materials in parts by mass: 45 to 65 parts of photo-activated grafted polypropylene resin, 10 to 20 parts of a multifunctional modifier with a core-shell structure, 8 to 15 parts of a bio-based nanofiber reinforcing agent, 5 to 10 parts of a temperature-sensitive shape memory toughening agent, 0.1 to 0.5 part of a photocatalytic anti-pollution antioxidant, 0.1 to 0.5 part of an ionic liquid-based lubricant and 0.5 to 2 parts of a bionic nano adhesion accelerant. The raw materials are subjected to melt blending, extrusion and granulation through a double-screw extruder, and finally drying and radio frequency plasma treatment are performed to obtain the polypropylene material. The material does not need complex pretreatment, forms super-strong adhesive force with paint by virtue of multiple innovative mechanisms, and is stable in a complex environment. The molded product has the advantages of top-grade appearance, smooth and defect-free surface, good gloss and color stability and excellent comprehensive performance, and can meet the strict use and processing requirements of automobiles.

The invention relates to the technical field of polypropylene plastics, and particularly discloses a preparation method of a high-toughness polypropylene plastic bucket, which comprises the following steps: dissolving benzoyl peroxide in toluene, adding an organic silicon prepolymer with double bonds at one end, and uniformly mixing to prepare a mixed solution; adding polypropylene K8003 and polypropylene Z30S into a high-speed mixer, adding the mixed solution, and mixing at 105-120 DEG C for 5-15 minutes to obtain a mixture; carrying out extrusion granulation on the mixture to obtain modified polypropylene; adding the obtained modified polypropylene, PP-g-MAH, a hydrogenated styrene-butadiene block copolymer, vinyl-terminated silicone oil, modified titanium dioxide and an antioxidant into a high-speed mixer for mixing, performing extrusion granulation, and finally performing injection molding to obtain the high-toughness polypropylene plastic bucket. The polypropylene plastic bucket is prepared by combining the polypropylene K8003, the polypropylene Z30S, the modified titanium dioxide, the antioxidant, the PP-g-MAH, the hydrogenated styrene-butadiene block copolymer and other components, and the components interact with one another, so that the toughness and the impact resistance of the polypropylene plastic bucket are improved.

The utility model discloses a polypropylene multi-unit collaborative devolatilization system, which belongs to the technical field of devolatilization in polypropylene production process, and comprises a polypropylene powder solid-phase devolatilization unit, a polypropylene powder solid-phase devolatilization unit, a polypropylene powder solid-phase devolatilization unit, a polypropylene powder solid-phase devolatilization unit and a polypropylene powder solid-phase devolatilization unit, the extrusion granulation devolatilization unit comprises an extruder and a granulator, an outlet of the powder collecting tank is connected with a feed port of the extruder, and an outlet of the extruder is connected with the granulator; the granule devolatilization unit comprises a hot air drying stock bin, and an outlet of the granulator is connected with an inlet of the hot air drying stock bin; an outlet of the hot air drying bin is used for being connected with a packaging production line. According to the melt devolatilization system disclosed by the utility model, the batch-type vacuum dryer is additionally arranged, so that the modification of a core equipment double-screw extruder is reduced, the process complexity of the melt devolatilization system is obviously reduced, the devolatilization efficiency is improved, and volatile components can be completely removed.

The preparation method comprises the following steps: shredding a light fibrous plant raw material which is difficult to process to 1-5mm, adding a certain amount of lignin, fully mixing with diammonium hydrogen phosphate or ammonium dihydrogen phosphate, carrying out hot press molding at 130-190 DEG C by using a pelletizer to prepare heavy particles with the particle size of 8-10mm, and carrying out high-temperature sintering to obtain the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material, thereby obtaining the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material and the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material. Heating the heavy particles to 400-700 DEG C in a rotary furnace, carbonizing for 1-3 hours, introducing a mixed gas of water vapor and air, and carrying out segmented activation at 850-950 DEG C-1000 DEG C to prepare high-quality activated carbon with the iodine value of more than or equal to 950 mg / g; crushing activated carbon to 140-325 meshes, mixing the crushed activated carbon with the composite glue solution, adding a proper amount of water for kneading, and forming the mixture into 2-8mm columnar particles by a hydraulic granulator or a screw extrusion granulator; through drying at the temperature of 100-300 DEG C and heat treatment at the temperature of 700-900 DEG C in a nitrogen, water vapor or anaerobic atmosphere, a basic group generated by the binder in the heat treatment has a very strong chemical adsorption effect on acid gas, later-stage modification is not needed, and excellent desulfurization and denitrification performance is achieved.

The invention discloses anti-shrinkage directional conductive supercritical foaming rubber and a preparation method thereof, and relates to the technical field of conductive rubber foam, raw materials comprise a rubber matrix, a modified fiber forming polymer and an auxiliary agent system, and the modified fiber forming polymer is prepared from a fiber forming polymer and a conductive filler. The preparation method comprises the following steps: extruding and granulating the fiber-forming polymer and the conductive filler to obtain modified granules, blending the modified fiber-forming polymer granules and the rubber matrix, carrying out extrusion and traction processes to obtain an in-situ fiber-forming modified rubber material, carrying out directional open milling, adding an auxiliary agent system, carrying out vulcanization molding, and foaming in a supercritical fluid to obtain the rubber foam material. The directional conductive fiber is constructed in the rubber matrix in situ, the rubber foaming material with directional conductivity and shrinkage resistance is prepared, the conductive efficiency is high, the problem that a rubber supercritical foaming material is prone to shrinkage is solved, and the rubber foaming material has the characteristics of heat insulation, light weight, high strength and the like and can be used for buffering and damping, heat insulation, electromagnetic shielding, flexible sensing and other scenes.

The invention discloses a composite material with a shielding function, a preparation method thereof and an interphone shell. The composite material comprises a polycarbonate-acrylonitrile-butadiene-styrene copolymer, a modified conductive filler, maleic anhydride grafted polyethylene, polyaryletherketone, a flame retardant, an antioxidant, glass microfibers and a compatilizer, wherein the modified conductive filler is aluminum oxide ceramic particles subjected to chemical copper plating and graft polymerization treatment. The preparation method comprises the steps of modified conductive filler preparation, step-by-step raw material mixing, twin-screw extrusion granulation and drying. The interphone shell is prepared from the composite material through injection molding, and the injection molding process comprises the steps of raw material drying, injection molding machine preheating, charging and injection molding, and demolding and finishing. The composite material is stable in electromagnetic shielding performance and has good mechanical strength and heat resistance; the preparation method can improve the dispersity of the components and is adaptive to conventional equipment; the interphone shell can block electromagnetic wave interference, is suitable for being used in multiple environments, and meets the requirements of an electronic equipment shell for shielding and structural performance.

The invention relates to the technical field of plastics, and discloses an anti-aging modified plastic and a preparation method thereof.The preparation method comprises the following steps that low-density polyethylene, maleic anhydride grafted polyethylene, an antioxidant 168, calcium stearate, calcium carbonate, 2-(2 '-hydroxy-3', 4 '-dihydroxyphenyl)-1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and a plasticizer are mixed, stirred and stirred, and The preparation method comprises the following steps: uniformly mixing 4, 5 '-di-tert-butylphenyl)-benzotriazole, quaternary phosphonium salt modified chitosan and modified magnolol in a high-speed mixer, carrying out extrusion granulation in a twin-screw extruder at a blending temperature of 190-195 DEG C and an extrusion temperature of 170-180 DEG C, drying, and carrying out injection molding by an injection molding machine to obtain the anti-aging modified plastic. The anti-aging modified plastic disclosed by the invention has relatively good anti-aging, flame-retardant and antibacterial effects.

The invention provides a low-warpage PA66 material and a preparation method thereof, and the preparation method comprises the following steps: mixing PA66 resin, modified mica, short carbon fiber, oxidized polyethlene wax and a titanate coupling agent, discharging and sieving to obtain a uniform premix; extruding and granulating through double screws; performing injection molding; and carrying out hot-bath shaping to obtain the product. According to the invention, by adopting a scale-fiber composite reinforcing system, modified mica sheets (transverse shrinkage inhibition) and short carbon fibers (longitudinal reinforcement) are compounded according to a specific proportion to form a cross lock catch structure, and bidirectional shrinkage stress is counteracted, so that the warping degree is reduced; the gradient microporous buffer layer is introduced, a 50-200 [mu] m closed pore structure is formed on the surface layer through a foaming agent ethanol solution in the injection molding stage, and internal stress is absorbed through elastic deformation of micropores, so that the residual stress is reduced, the impact strength is improved, and the brittleness problem of a traditional low-warping material is avoided.

The invention relates to the technical field of composite materials, and discloses a PVC composite material with an antibacterial function and a preparation method thereof.The composite material is prepared by taking polyvinyl chloride as a base material and a bamboo fiber modified material and the like as auxiliary materials through mixing and extrusion granulation processes. Wherein the bamboo fiber modified material is prepared by simultaneously modifying a quaternary ammonium salt cationic antibacterial agent and macromolecular polybutadiene on the surface of bamboo fiber, and the bamboo fiber exists in the composite material in a physical core manner, so that the polyvinyl chloride can be reinforced and toughened; the existence of the quaternary ammonium salt cationic antibacterial agent can endow the composite material with good antibacterial performance, and the bamboo fibers are limited in a cross-linked network, so that a confinement effect can be generated on the antibacterial agent, the problems of migration, precipitation and the like of the antibacterial agent can be avoided, and the long-acting antibacterial performance of the composite material is guaranteed.

The invention belongs to the technical field of polyester fibers, and particularly provides a flame-retardant polyester fiber and a preparation method thereof.The polyester fiber is prepared from, by weight, 50-70 parts of polyester chips, 6-10 parts of flame-retardant polyester master batch and 1-2 parts of antioxidant; wherein the flame-retardant polyester master batch is obtained by extruding and granulating a montmorillonite-based flame retardant and polyester powder. According to the invention, the montmorillonite-based flame retardant is introduced into the polyester fiber, so that the polyester fiber has excellent flame retardance and anti-dripping effect.

The present invention relates to the field of polymer waterproofing membranes, and discloses a modified fluorosilicone rubber and its preparation method, a rubber compound composition for waterproofing membranes, a waterproofing membrane and its preparation method and application; the method includes: S1, performing a first mixing on graphite, a filler and a silane coupling agent to obtain a mixture I; S2, performing a second mixing on the fluorosilicone rubber and the mixture I to obtain a mixture II; S3, performing an extrusion granulation treatment on the mixture II to obtain the modified fluorosilicone rubber; relative to 100 parts by weight of the fluorosilicone rubber, the dosage of the filler is 10-20 parts by weight, the dosage of the graphite is 1-10 parts by weight, and the dosage of the silane coupling agent is 1-3 parts by weight. The waterproofing membrane prepared by using the modified fluorosilicone rubber provided by the present invention can simultaneously have excellent weather resistance and thermal stability.

The embodiment of the invention provides a preparation method of an optical cable filling wire and the optical cable filling wire, and belongs to the technical field of optical cables, and the preparation method of the optical cable filling wire comprises the following steps: mixing base material preparation materials according to a first preset proportion weight; the mixed base material preparation materials are fed into extrusion equipment for extrusion granulation, and a filling base material is prepared; the surface of the filling base material is coated with a lubricating wrapping layer; a foaming agent wrapping layer is coated outside the lubricating wrapping layer; and feeding the filling base material coated with the foaming agent wrapping layer into the extrusion equipment for extrusion to obtain the optical cable filling wire. According to the preparation method of the optical cable filling wire, the adhesion and stability of the foaming material on the filling base material can be improved, the overall density and weight of the optical cable filling wire are reduced through the foaming process, and the production cost of the optical cable filling wire is reduced.

The invention relates to the technical field of foaming materials, in particular to a shoe material preparation process for finished shoes based on supercritical physical foaming and the finished shoes. The preparation method comprises the following steps: 1) weighing a matrix, octadecyl polyhedral oligomeric silsesquioxane, an active group-containing styrene-acrylonitrile copolymer, a polydimethylsiloxane block copolymer, an epoxy functional group-containing olefin copolymer, a nano silicon dioxide dispersion and a processing aid, uniformly mixing, blending, extruding, granulating and drying to obtain a blended material, wherein the matrix, the octadecyl polyhedral oligomeric silsesquioxane, the active group-containing styrene-acrylonitrile copolymer, the polydimethylsiloxane block copolymer, the epoxy functional group-containing olefin copolymer, the nano silicon dioxide dispersion and the processing aid are mixed uniformly; the preparation method comprises the following steps of (1) preparing a polymer, (2) plasticizing the blended material to form a preformed blank, injecting supercritical gas, and fully dissolving the supercritical fluid in the polymer at the temperature of 150-180 DEG C and the pressure of 10-20MPa for 1-3 hours, (3) reducing the pressure to normal pressure within 10 seconds at the pressure reduction rate of less than or equal to 2MPa / s, and (4) cooling and shaping at the temperature of 60-80 DEG C to obtain the shoe material.

The invention discloses plastic pipeline particles prepared from waste incineration fly ash and a preparation method of the plastic pipeline particles. The particles are prepared from the following raw materials in parts by weight: 5-25 parts of PE, 20-100 parts of superfine calcium carbonate, 1-5 parts of needle-like wollastonite, 1-5 parts of chopped carbon fibers, 1-15 parts of rutile type titanium dioxide, 10-75 parts of waste incineration fly ash, 1-20 parts of paraffin, 0.2-5 parts of a coupling agent and 0.5-10 parts of a dispersing agent. The preparation method comprises the following steps: 1, cleaning and airing the fly ash, and crushing and grinding the fly ash into 600-1250-mesh powder P; 2, mixing the powder P with inorganic fillers such as superfine calcium carbonate at a high speed of 100-130 DEG C to obtain a composite filler M; 3, mixing and modifying the filler M with a dispersing agent and a coupling agent at a high speed to obtain modified powder MP; 4, MP, PE and paraffin are mixed and plasticized at a high speed, and single-screw extrusion granulation is performed. The particles achieve fly ash recycling and are excellent in processability, the prepared PE pipeline is high in strength, resistant to corrosion and long in service life and can be used as an industrial or municipal sewage pipeline, and the preparation method is convenient, fast and efficient.

The invention discloses a high-temperature-resistant flame-retardant wire harness and a preparation method thereof, and relates to the technical field of electric harnesses. The method comprises the following steps: firstly, introducing phosphorus and silicon flame-retardant elements on a polyethylene molecular chain through plasma activation and free radical grafting reaction to prepare phosphorus-silicon grafted modified polyethylene, then compounding aminated silicon dioxide and organic intercalated montmorillonite by using isophorone diisocyanate as a bridging agent to prepare the phosphorus-silicon grafted modified polyethylene composite material. The preparation method comprises the following steps: preparing an isocyanate-bridged silicon dioxide-montmorillonite composite filler to improve the dispersity and compatibility of the filler in a matrix, carrying out extrusion granulation on modified polyethylene, an ethylene-butyl acrylate copolymer, maleic anhydride grafted polyethylene, the composite filler, nano magnesium hydroxide and other additives to prepare polyethylene wire harness particles, and finally, carrying out extrusion granulation on the polyethylene wire harness particles to prepare the cable harness. And coating the surface of a copper core wire with the particles through a single-screw extrusion coating machine, and carrying out subsequent water cooling, steam treatment, drying and rolling to obtain a finished wire harness. The wire harness prepared by the invention has excellent high temperature resistance and flame retardance.

The invention discloses a multi-layer composite polypropylene color master batch and a preparation method thereof.The multi-layer composite polypropylene color master batch comprises an inner layer, a middle layer and an outer layer, the inner layer is coated with the middle layer, the middle layer is coated with the outer layer, matrix resin, a composite toughening agent and an interface modifier are subjected to melt blending in a double-screw extruder, nano reinforcing filler is added, extrusion granulation is performed, and the multi-layer composite polypropylene color master batch is obtained. Carrier resin, hyperbranched polyesteramide and a toner pre-dispersion body are mixed at a high speed and then uniformly coated on the outer surface of the inner layer through fluidized bed equipment, and a mixture of a weather-proof additive and a lubricant is attached to the outer surface of the middle layer by adopting an electrostatic spraying process to form the outer layer. According to the multi-layer composite color master batch, the matrix resin and the composite toughening agent have a synergistic effect, so that the impact strength of the color master batch is improved, the cavity structure of hyperbranched polyesteramide is coated with the toner, the silane is used for treating the nano filler to reduce agglomeration and chromatic aberration, the outer layer delays aging, the lubricant reduces the extrusion torque, and the multi-layer composite color master batch is adaptive to a high-speed pipe production line.

The invention relates to an in-situ three-dimensional skeleton based on a powder coating method, a high-thermal-conductivity interface material of the in-situ three-dimensional skeleton and a preparation method and application of the high-thermal The in-situ three-dimensional heat-conducting network is prepared by mixing a three-dimensional framework material, a template sacrificial agent, a permanent binder and a thermal degradation catalyst in proportion, extruding and granulating, and then carrying out heat treatment. Then, polydimethylsiloxane, polyethylene glycol or paraffin and the like are used as polymer matrixes to be mixed with aluminum powder or aluminum oxide, the mixture is immersed into the in-situ three-dimensional heat-conducting network through an impregnation method for curing, and the thermal interface material of a double-heat-conducting-network skeleton structure is prepared. The double-heat-conduction network structure obviously improves the heat conduction effect of the thermal interface material, the thickness of the formed high-heat-conduction material is controllable, and the contact thermal resistance is effectively reduced. The introduction of the double-heat-conduction network skeleton structure reduces the interface thermal resistance to obtain the high-heat-conduction interface material, and the material is simple in preparation process, low in cost, recyclable and suitable for large-scale industrial production.

The invention relates to high-strength corrosion-resistant PA66 and a preparation method and application thereof, and belongs to the technical field of high polymer materials, the high-strength corrosion-resistant PA66 comprises the following raw materials: 55-65 parts of a PA66 base material, 20-25 parts of multifunctional modified glass fibers, 0.5-1.5 parts of an antioxidant, 1-2 parts of a lubricant, 0.1-0.5 part of a coupling agent and 2-4 parts of a flexibilizer; according to the technical scheme, the silane modified glass fiber is obtained by combining the nano material with the glass fiber and then grafting the silane coupling agent; combining the silane modified glass fiber, diamine and fluorinated dianhydride to obtain an anhydride-terminated compound; combining the anhydride-terminated compound with amphiphilic hyperbranched polyester to obtain the multifunctional modified glass fiber; mixing the PA66 base material, the multifunctional modified glass fiber, an antioxidant, a lubricant, a coupling agent and a flexibilizer, and performing extrusion granulation to obtain the high-strength corrosion-resistant PA66. The corrosion resistance, the thermal stability and the mechanical property of the PA66 are integrally improved.