1687 results about "Melt extrusion" patented technology

The invention relates to the technical field of capacitor films, in particular to a high-temperature-resistant polypropylene capacitor film and a preparation method thereof.The high-temperature-resistant polypropylene capacitor film is prepared from, by weight, 94-98 parts of polypropylene resin, 1-3 parts of filler-doped modified balance adjusting agent, 0.5-2 parts of boron nitride-glass fiber combined agent, 0.05-0.4 part of nucleating agent, 0.2-0.4 part of antioxidant and 0.1-0.4 part of silane coupling agent; the high-temperature-resistant polypropylene capacitor film is obtained through the processes of melting extrusion molding, cooling shaping, preheating, two-way stretching, heat shaping, rolling and the like of the raw material composition. The polypropylene resin, the nucleating agent, the antioxidant and the silane coupling agent are blended, the filler-doped modified balance adjusting agent and the boron nitride-glass fiber coupling agent are added, and the raw materials are blended and coordinated, so that high feasibility of a two-way stretching process is guaranteed, breakdown resistance, mechanical strength and dielectric loss performance of the product are optimized, and the product has good mechanical properties. And meanwhile, the high-temperature-resistant and corrosion-resistant stability effects are remarkable.

The invention relates to the technical field of high polymer material preparation, and discloses a bamboo fiber graft modified full-biodegradable composite membrane material preparation process which comprises the following steps: firstly, performing hot mixing and cooling on dried bamboo fiber powder, anhydrous citric acid, choline chloride, activated zinc oxide and pentaerythritol to prepare a bamboo fiber modified premix; then mixing the biodegradable polyester resin with the premix; adding the mixture into an extruder, injecting epoxidized soybean oil into a barrel through a liquid metering device, and performing melt extrusion granulation under a vacuum exhaust condition; and finally carrying out blow molding to form the film. Through in-situ reaction extrusion of multi-component synergism, surface grafting of bamboo fibers, chain extension of a polyester matrix and interface chemical bonding of the bamboo fibers and the polyester matrix are achieved, interface compatibility is effectively improved, degradation of the material in the processing process is inhibited, and the mechanical property and thermal stability of the composite film material are remarkably improved; the process is efficient and environment-friendly, and the cost is controllable.

The invention is suitable for the field of film manufacturing, and provides a PO film tape casting process which comprises the following steps: S1, raw material pretreatment; s2, mixing the materials; s3, melt extrusion; s4, carrying out tape casting; s5, cooling and shaping; s6, thickness detection and adjustment; s7, carrying out post-treatment; and S8, rolling is conducted. According to the invention, the three-stage gradient cooling process significantly reduces the internal stress of the film, improves the dimensional stability, and reduces the warping shrinkage of subsequent processing; the thickness deviation of the thin film is controlled within + / -0.01 mm through an online thickness detection and automatic adjustment system, so that the product precision is improved; the surface tension of the film is stably improved by the corona post-treatment process, and the application scene is widened; through strict raw material pretreatment, the bubble defect of the film is effectively avoided, and the appearance quality of the product is improved; and a combined process of high-speed mixing and double-screw extrusion is adopted, so that uniform dispersion and full plasticization of the materials are ensured, and the problems of crystal points, stripes and the like are reduced.

The invention relates to the technical field of polyurethane films, in particular to a long-acting, stable, flexible, impact-resistant and resistance-reducing protective film and a preparation process thereof. According to the invention, the raw materials such as polyethylene glycol, a modified fluorosilicone monomer, isophorone diisocyanate, hydroxyethyl acrylate, an acrylic antifouling monomer, dodecafluoroheptyl methacrylate and the like are added to prepare the anti-drag coating. Mixing a polyurethane thermoplastic elastomer, aminopropyl polydimethylsiloxane, an antioxidant and an ultraviolet light absorber, and carrying out melt extrusion and blow molding to form a film, so as to obtain a flexible impact-resistant base film; and uniformly coating the surface of the flexible anti-impact base film with the anti-drag coating, and carrying out ultraviolet curing to obtain a finished product. The finished product prepared by the invention has good impact resistance, and can effectively reduce frictional resistance, so that the finished product has wide application prospects in the technical field of polyurethane films.

The invention relates to an antistatic MLCC release film base film and a preparation method thereof. The antistatic MLCC release film base film is prepared by melt blending and biaxial stretching of PET master batch, an antistatic composition and a nano filler, wherein the antistatic composition is prepared by compounding modified PET-PEG and thiophene modified aromatic polyamide; the nano filler is prepared by carrying out melt extrusion on KH550 modified talcum powder and MAH-g-PET (maleic anhydride-grafted polyethylene terephthalate). The antistatic composition disclosed by the invention has the beneficial effects that the antistatic composition is formed by interweaving two polymers, and a stable three-dimensional conductive network is constructed in the PET film, so that the antistatic performance is more efficient, lasting and stable. In addition, through chemically bonded modified talcum powder, the smoothness and low roughness are provided, and meanwhile reinforcing and toughening are achieved; and the single-layer extrusion process can realize ultrathin thin film, the production process is simplified, and the production cost is greatly reduced.

The invention discloses CPVC (Chlorinated Polyvinyl Chloride) modification-based high-wear-resistance antistatic plastic and a preparation method thereof, belongs to the technical field of composite CPVC preparation, and aims to solve the technical problem that the wear resistance and the antistatic property of CPVC-based plastic in the prior art need to be further improved. The high-wear-resistant antistatic plastic based on CPVC modification comprises the following raw materials in parts by weight: 80-100 parts of modified CPVC, 6-8 parts of a modified heat stabilizer and 8-16 parts of an auxiliary material, the amino group on the surface of the prepared antistatic filler participates in the ammoniation process of the prepared CPVC, a large number of amino groups hybridize the chain segment structure of the CPVC and introduce tertiary amino groups, and an ion structure is introduced into the hybridized CPVC through quaternary ammonium salinization to obtain the modified CPVC. The CPVC-based plastic is obtained by mixing, melting and extruding the CPVC-based plastic, the prepared polyamide acid-based modified heat stabilizer and auxiliary materials.

The invention relates to a preparation method of a high-antibacterial hydrophobic polyamide fiber. The preparation method comprises the following steps: carrying out melt extrusion grafting on polyamide, a quaternary ammonium salt monomer, an initiator and an auxiliary agent to prepare quaternary ammonium salt grafted polyamide; and carrying out melt blending on the prepared quaternary ammonium salt grafted polyamide, polyamide, cuprous oxide and polydimethylsiloxane to obtain the high-antibacterial hydrophobic nylon composite material. And spinning the high-antibacterial hydrophobic nylon composite material to obtain the high-antibacterial hydrophobic polyamide fiber. The high-antibacterial hydrophobic nylon composite material prepared by the method disclosed by the invention can realize efficient antibacterial performance, and the high antibacterial hydrophobic performance of the prepared polyamide fiber is improved.

This case relates to a self-healing optical film and its preparation method. The optical film is made by adding a nanoparticle suspension to PET masterbatch as the main material during its melt extrusion process, resulting in a cast sheet. After biaxial stretching, a self-healing coating liquid is coated online, followed by shaping and cooling. The nanoparticle suspension includes nano-titanium oxide, MAH-PET polymer, ATO nanoparticles, and titanate coupling agent. The self-healing coating liquid is produced by core-shell emulsion polymerization, forming a nano-silica hard core and an acrylate functional monomer polymer soft shell. This invention adds the nanoparticle suspension by in-situ feeding in the middle of the extruder, reducing steps, improving dispersion uniformity, and making the film surface smoother. Then, the self-healing coating liquid is applied online after longitudinal stretching and before transverse stretching, forming a film on the film surface, improving the hardness and scratch resistance of the film material, enabling rapid self-healing at room temperature, strong stability, and avoiding the occurrence of rainbow patterns.

The invention belongs to the technical field of high polymer materials, and particularly relates to a PVB (Polyvinyl Butyral) film and a preparation method thereof. The PVB film provided by the invention is prepared from the following components in parts by mass: 100 parts of PVB resin, 33 to 36 parts of triethylene glycol di-2-ethylhexoate, 7 to 9 parts of integrated anti-radiation toughening filler, 1 to 2 parts of organic montmorillonite, 0.8 to 1.2 parts of composite coupling agent, 0.5 to 1 part of ultraviolet light absorber, 0.6 to 0.8 part of antioxidant and 0.8 to 1 part of heat stabilizer. The integrated anti-radiation toughening filler adopts a core-shell structure, the anti-radiation core is composed of bismuth oxide and tungsten oxide according to the mass ratio of 3: 1, and the elastic coating layer is maleic anhydride grafted modified POE. The preparation method comprises the steps of pre-dispersion treatment, component mixing, melt extrusion, film casting, graded cooling, two-way stretching and the like. Through the core-shell structure design of the integrated anti-radiation toughening filler and the optimized processing technology, the anti-radiation performance and the toughening performance are synergistically improved, and the prepared film has the advantages of excellent anti-radiation effect, high toughness and good transparency.

The invention relates to the field of regenerated fiber production equipment manufacturing and process integration, and discloses a modular intelligent continuous regenerated fiber production line which comprises a sorting and cleaning module, a melt extrusion module, an impurity filtering module, a granulation module, a decoloration module, a solid phase polycondensation tackifying module and a melt spinning module. The self-adaptive material distribution device is used for realizing material connection among the modules; the automatic control system is used for realizing collaborative operation of all the modules; wherein the solid phase polycondensation tackifying module is provided with an intelligent control unit for dynamically optimizing the operation of the solid phase polycondensation tackifying module. Compared with the prior art that each process is relatively independent and depends on manual scheduling or simple linkage, the scheme effectively overcomes the common problems of unsmooth material conveying, unbalanced matching between modules and insufficient automation degree in the traditional regeneration process, and remarkably improves the production continuity and the resource utilization rate.

The invention discloses a high-toughness regenerated ABS (Acrylonitrile Butadiene Styrene) composite material and a preparation method thereof, belongs to the technical field of material regeneration, and is used for solving the technical problem that the tensile resistance and flame retardance of a regenerated ABS material in the prior art need to be further improved. The regenerated ABS composite material comprises the following raw materials in parts by weight: 70-80 parts of regenerated ABS, 10-12 parts of a modified toughening agent, 15-18 parts of composite whiskers and 3-6 parts of auxiliary materials, in the process of recycling waste ABS, active groups in ABS chain segments are protected by using a protective agent and a temperature agent, regenerated ABS is obtained by using a solvent purification method, a modified toughening agent and composite whiskers are prepared, and after the regenerated ABS, the modified toughening agent and the composite whiskers are subjected to melt extrusion with auxiliary materials, through the promotion effect of a titanium dioxide component on electron irradiation and through irradiation crosslinking, the modified toughening agent, the composite whiskers and the auxiliary materials are subjected to melt extrusion. Finally, the high-toughness composite ABS is prepared.

The invention discloses a high-stability endotoxin-free PHA nano-emulsion and a preparation method thereof, and belongs to the technical field of biodegradable high polymer material compositions and processing thereof. The nano-emulsion is characterized in that the endotoxin content is not higher than 0.10 EU / g, the median particle size d50 is 100-200 nm, and the PDI is not higher than 0.15, and the nano-emulsion is stable in long-term storage. The preparation method is a continuous solvent-free process and comprises the steps of melt extrusion, high-pressure thermal emulsification and deep endotoxin removal. By adopting the specific pH-insensitive cationic polymer emulsifier and the crystallization inhibitor, the chemical contradiction that an efficient alkaline purification process is incompatible with a nano-emulsion stable system is solved, physical aging is inhibited, and an unexpected technical effect is obtained. The invention also discloses an O / W type cream containing the nano emulsion.

The invention provides a manufacturing process of high-heat-insulation ray-proof antibacterial glass. The high-heat-insulation ray-proof antibacterial glass comprises outer-layer glass, a middle functional layer, inner-layer glass and an extensible layer, the manufacturing process comprises a PVB adhesive film preparation process and a laminated glass whole process, wherein the PVB adhesive film preparation process specifically comprises the steps of raw material mixing, melt extrusion, tape casting and coiling; the whole process of the laminated glass comprises the steps of glass pretreatment, interlayer assembly, high-temperature and high-pressure forming and post-treatment and quality inspection. According to the design scheme of the multi-film composite laminated glass, based on the structural characteristics of the laminated glass, a layered ray-blocking customized glass scheme is provided in combination with the combination of heat-insulating PVB films and other films with different functions, and the scheme is suitable for scenes such as sunlight rooms, agricultural planting or market curtain walls and the like.

The application discloses a kind of ship super-long anticorrosion special nano powder coating, preparation method and application, belong to ship heavy anticorrosion material technical field.The preparation method of the ship super-long anticorrosion special nano powder coating is as follows: epoxy resin, graphene modified epoxy resin, core-shell structure ZnO@SiO2, modified 2,5-dimercapto-1,3,4-thiadiazole, borosilicate glass powder, flaky boron nitride, silane coupling agent modified silica, phenolic amine curing agent, 2-ethyl-4-methylimidazole, fumed silica, defoaming agent, ultraviolet absorber, high-temperature pigment are put into stirrer and stirred for 20-30min, then melt extrusion is carried out through double screw extruder, the extrusion temperature is 90-110 DEG C, grinds and sieves, and the ship super-long anticorrosion special nano powder coating is obtained.The coating prepared by the application has good anticorrosion performance and can be applied in the field of ship metal surface corrosion protection.

The invention belongs to the technical field of information, and particularly relates to a taboo search algorithm-based waste plastic regeneration production process energy-saving method, which comprises the following steps of: firstly, carrying out detailed modeling and energy consumption analysis on a production process, covering links such as raw material pretreatment, melt extrusion and the like, and constructing an energy consumption model; secondly, designing a tabu search algorithm, representing an optimization scheme by a solution vector, and searching an optimal solution by taking the minimum energy consumption as a target function through the steps of initial solution generation, neighborhood search, tabu table operation and the like; and finally, making an optimization scheme according to the optimal solution and implementing, monitoring and evaluating in real time, and adjusting and perfecting according to a result. The scheme aims at improving the energy utilization efficiency and reducing the cost and environmental pollution.

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 belongs to the technical field of ETFE film preparation, and particularly relates to a preparation method of a high-strength ETFE film. The preparation method of the ETFE film comprises the following steps: preparing a mixture of modified nano cellulose and calcium magnesium silicate whiskers; carrying out modification treatment on the poly (p-benzamide) fiber; and preparing the ETFE film. According to the preparation method of the high-strength ETFE film, the perfluoroalkoxy copolymer and the ETFE resin are selected and mixed for use, during melt extrusion, the perfluoroalkoxy copolymer can lubricate the ETFE and reduce the overall melt viscosity, the critical shear rate of the perfluoroalkoxy copolymer is higher than that of the ETFE, melt fracture can be inhibited, the film is evenly extruded, the flatness of the film surface is improved, and the high-strength ETFE film is prepared. And meanwhile, the elastic retraction of the ETFE is inhibited during high-temperature setting. And the modified nano cellulose and calcium magnesium silicate whisker mixture and the modified poly-p-benzamide fiber are added to enhance the mechanical strength of the prepared ETFE film.

The invention relates to the technical field of spunbond non-woven fabric manufacturing, in particular to a low-cost recyclable spunbond non-woven fabric manufacturing method capable of replacing traditional kraft paper, and the method comprises the steps of raw material preparation, melt extrusion, spinning web forming, hot-press shaping, cooling and trimming, post-processing, coiling and forming and the like. Raw materials comprise polypropylene particles, degradable master batches and recycled spunbond non-woven fabric fragments, the recycled fragments are subjected to surface modification treatment, and the degradable master batches contain polylactic acid, a starch-based degradation agent and other components. The non-woven fabric is quantified to 80-120 g / m < 2 > by optimizing processes such as a barrier type screw, infrared preheating and laser trimming and cooperating with water-repellent and antistatic post-treatment, the mechanical properties such as tensile strength, tearing strength and folding resistance are superior to those of traditional kraft paper, the non-woven fabric can be recycled for at least three times, and the degradation period is controllable; the method realizes closed-loop utilization of raw materials, reduces cost and energy consumption, expands application in the fields of packaging, agriculture and the like, and has remarkable economic and environmental benefits.

The invention relates to the technical field of materials, and discloses a wear-resistant high-toughness polypropylene material and a preparation method thereof.The polypropylene material is prepared by taking polypropylene as a base material and taking a compatibilizer, an ethylene-octylene block copolymer, a mullite functional agent and the like as auxiliary materials through mixing and melt extrusion processes. Wherein the mullite functional agent is prepared by modifying the surface of mullite with a branched macromolecular polymer connected by an ester bond, and the existence of the macromolecular polymer can improve the compatibility between the mullite and a polypropylene matrix, so that the mullite can efficiently exert the self-enhancement effect, the stress deformation resistance of the material is improved, and the mechanical property of the material is improved. And the material has high-strength and high-toughness effects. Besides, the macromolecular polymer can be cross-linked with a polypropylene molecular chain, so that the structural density of the material is improved, the material has higher hardness, the grinding crack width of the material on a membrane material surface is reduced, and the wear resistance of the material is improved.

The invention provides a blow molding product wall thickness on-line control method based on image recognition, and relates to the technical field of on-line control, and the method comprises the following steps: formulating type process parameters, calculating wall thickness adjustment parameters according to the adjusted melt extrusion amount and die orifice shape, adjusting the type process parameters to obtain molding control parameters, and controlling the molding control parameters to be in a closed state. And acquiring the thickness of the target blow molding product in the forming process to obtain time sequence thickness data. And whether the time sequence thickness data reach a preset target thickness threshold value or not is judged, if yes, the current forming control parameters are maintained, and if not, the wall thickness adjusting parameters are optimized. And performing feature extraction on the time sequence thickness data to obtain wall thickness deviation features, analyzing a linkage relationship between the wall thickness deviation features and the type process parameters to obtain associated correction parameters, and optimizing the wall thickness adjustment parameters to obtain wall thickness correction parameters. The directional correction capability of local deviation can be enhanced, the wall thickness control precision and stability are improved, and the method is suitable for products with different shapes and functions.

The invention discloses a process for preparing flame-retardant polyethylene plastic by recycling waste polyethylene plastic, and relates to the technical field of high polymer materials. When the flame-retardant polyethylene plastic is prepared, the waste polyethylene is extruded and granulated to prepare the polyethylene master batch; carrying out catalytic pyrolysis on the polyethylene master batch, and then reacting with potassium permanganate to prepare a hydroxylated carbon nanotube; the preparation method comprises the following steps: reacting a hydroxylated carbon nanotube with 1-(chloro-methylphosphoryl) ethylene, and then reacting with (mercaptomethyl) triethoxysilane to prepare a modified carbon nanotube; the preparation method comprises the following steps: carrying out irradiation grafting on a polyethylene master batch, 2-hydroxy-4-propenyl benzophenone and N, N-diethyl allylamine, and then reacting with chloromethyl triethoxy silane to prepare modified polyethylene; and carrying out melt extrusion on the modified carbon nanotubes and the modified polyethylene, carrying out injection molding, and carrying out water treatment to obtain the flame-retardant polyethylene plastic. The flame-retardant polyethylene plastic prepared by the invention has good flame retardant property, antibacterial property, tensile strength and anti-aging property.

The invention discloses a high-flexibility drag chain cable and a preparation method thereof, belongs to the technical field of cable processing, and is used for solving the technical problem that the flame retardance and wear resistance of a drag chain cable in the prior art need to be further improved, and the high-flexibility drag chain cable specifically comprises a battery cell, a wrapping layer and a sheath layer which are sequentially arranged from inside to outside, and the sheath layer wraps the wrapping layer. The preparation method comprises the following steps: preparing a modified flame retardant from modified polysiloxane and a phosphorus-based substance through amine-aldehyde condensation, introducing the modified flame retardant into a polyurethane chain segment through a block reaction, carrying out a chain extension reaction to obtain modified polyurethane with a three-dimensional network structure, carrying out melt extrusion on the modified polyurethane, a filler and an auxiliary additive, and coating a wrapping layer with the obtained product. According to the drag chain cable, the flame retardant property and wear resistance of the drag chain cable are improved, and the distortion resistance of the drag chain cable is also improved.

The present invention relates to the field of polyurethane materials and particularly to a temperature-induced color-changing vehicle film and a preparation method therefor. The method of the present invention comprises: firstly, using polyurethane to wrap vanadium dioxide powder to obtain color-changing microcapsules; then using 1,1,1,3,5,5,5-heptamethyltrisiloxane and 3-allyloxy-1,2-propanediol as raw materials to synthesize an organosilicon-modified diol, and enabling trimellitic anhydride to react with toluene diisocyanate to synthesize a dicarboximide compound; enabling the organosilicon-modified diol and the dicarboximide compound to undergo an esterification reaction and a polymerization reaction to obtain an organosilicon-modified imide polyester diol; then mixing the organosilicon-modified imide polyester diol with polytetrahydrofuran ether glycol 2000, and then enabling the mixture to react with toluene diisocyanate to obtain a polyurethane elastomer; and mixing the polyurethane elastomer, the color-changing microcapsules, a silane coupling agent, a plasticizer, an antioxidant, and an ultraviolet light absorber, followed by melt extrusion and blow molding into a film, so as to obtain the temperature-induced color-changing vehicle film.

The invention relates to the technical field of films, in particular to a high-surface tension aluminized base film and a preparation method thereof. The method comprises the following steps: grafting modified fumed silica with a silane coupling agent KH-570, and grafting a ternary polymerization shell layer composed of 2-acrylamide-2-methylpropanesulfonic acid, lauryl methacrylate and glycidyl methacrylate on the surface of the modified fumed silica to obtain organic anti-sticking silica; secondly, synthesizing an aromatic sulfonated polyester prepolymer, loading nano titanium dioxide, and carrying out melt blending extrusion with polypropylene to form polar cluster polypropylene master batches; and finally, blending polypropylene resin, the master batch and maleic anhydride grafted polypropylene, and carrying out melt extrusion, air cooling and slow cooling and two-way stretching molding. The obtained base film is high in surface tension, high in aluminized layer adhesive force, excellent in oxygen and water vapor barrier property, good in thermal stability and suitable for the field of high-end packaging.

The invention relates to the technical field of degradable materials, and discloses a water-soluble degradable fiber and a preparation method thereof. The water-soluble degradable fiber disclosed by the invention is prepared by taking polylactic acid as a main matrix, adding modified sodium lignin sulfonate, polyvinyl alcohol and polyethylene wax, blending, carrying out melt extrusion, and carrying out melt spinning. The fiber has water solubility, degradability, sand carrying performance and salt resistance, and has a good application prospect in a fracturing fluid used in a well drilling fracturing process based on the advantages of water solubility, degradability, sand carrying performance and salt resistance.

The invention discloses a synthetic leather nascent fiber melt extrusion device and a use method, and belongs to the technical field of spinning machines.The synthetic leather nascent fiber melt extrusion device comprises a shell, an injection pipe is installed at the position, close to the upper end, of the left side of the shell, a conveying pipeline is installed at the position, close to the lower end, of the right side of the shell, and a spinneret plate is installed at the right end of the conveying pipeline; and a filter cartridge is mounted in the shell. The motor can drive the filter cartridge to rotate and dynamically change the filtering area, so that the possibility of blockage of the filtering holes is effectively reduced, the uniformity of the filtering process is ensured, excessive blockage of the local filtering area is avoided, and when the filter cartridge rotates, the touch block is utilized to touch the touch switch, so that the filtering efficiency is improved. The electromagnet is instantly controlled to drive the cleaning needle to automatically clean impurities and small bubbles in the filter holes, then the small bubbles are discharged in time by using vibration force during cleaning, and the problem that the bubbles penetrate through the filter holes due to pressure deformation, and spinning is interrupted is solved.

The invention discloses a low-smoke halogen-free environment-friendly insulated cable material and a preparation method thereof, belongs to the technical field of insulated cable materials, and is used for solving the technical problem that the insulating property and flame retardant property of an insulated cable material in the prior art need to be further improved. The material comprises the following raw materials in parts by weight: 80-100 parts of cross-linked polypropylene and 21-28 parts of an auxiliary additive, graphene and boron nitride are activated, double-bond structures are modified on the surfaces of the graphene and the boron nitride, the graphene and the boron nitride are mixed to obtain a composite filler, the composite filler is modified by a ball-milling modifier in the ball-milling process, the modified composite filler and a polypropylene material are mixed, melted and extruded, and the composite filler is prepared. And carrying out electron radiation to obtain crosslinked polypropylene, and carrying out mixing, melting and extrusion on the crosslinked polypropylene and auxiliary materials to obtain the low-smoke wear-resistant insulated cable material.

The invention discloses an indoor flame-retardant insulated flexible wire and a preparation method thereof, belongs to the technical field of flexible wires, and is used for solving the technical problem that the insulating property and flame-retardant property of an indoor flexible wire in the prior art need to be further improved. The cable comprises a wire layer formed by twisting a plurality of copper wires, an insulating layer and an outer sheath layer, a modified aminating agent taking a siloxane chain segment as a main body is prepared, polyvinyl chloride is aminated and hybridized with a space chain segment of the polyvinyl chloride at the same time, after phosphorus-hydrogen addition and surface modification, the hybridized polyvinyl chloride is obtained, and through sodium hypophosphite and 1, 2, 4-trimethyl-1, 3-pentanediol, the flame retardant is added to the polyvinyl chloride, so that the cable is formed. The preparation method comprises the following steps: carrying out phosphorus-hydrogen addition on 2, 3-dihydroxystyrene to obtain a modified cross-linking agent, forming a spherical structure by the modified cross-linking agent and phosphonitrilic chloride trimer under triethylamine and ultrasonic conditions, carrying out surface modification to obtain flame-retardant microspheres, and carrying out melt extrusion on the modified cross-linking agent and phosphonitrilic chloride trimer as main materials and auxiliary materials of an outer sheath layer to finally prepare the flame-retardant insulated flexible wire.

The invention relates to the technical field of power cables, in particular to a fire-fighting special double-flame-retardant power cable and a preparation method thereof, and the fire-fighting special double-flame-retardant power cable comprises a circular conductor, an insulation shielding layer, a metal layer, a metal armor layer and a polyethylene flame-retardant outer sheath which are sequentially arranged from inside to outside; the polyethylene flame-retardant outer protective layer is prepared by mixing a P / N / S / S i quaternary modified boron nitride flame retardant and linear low-density polyethylene in an internal mixer, heating, melting and extruding; the preparation of the flame retardant comprises the following steps: carrying out substitution reaction on three flame-retardant element modified DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) containing amino groups, namely P / N / S, and bis (chloropropyl) tetramethyldisiloxane to prepare a P / N / S / S i quaternary flame-retardant material; carrying out substitution reaction on the C < l > group of the P / N / S / S quaternary flame-retardant material and hydroxylated boron nitride to obtain a P / N / S / S quaternary modified boron nitride flame retardant; according to the invention, the power cable can maintain good flame retardance under the condition of long-time damp-heat aging.

The present invention discloses a degradable high-barrier composite BOPP matting film. The present invention also discloses a preparation method of the above-mentioned degradable high-barrier composite BOPP matting film. Tannic acid is added to a single-layer magnesium-aluminum hydrotalcite colloid, the system is adjusted to be alkaline, and stirring is continued for 1-3 h. Then it is mixed uniformly with polypropylene and added to an extruder, and melt-extruded at 180-200 °C to obtain a composite polypropylene resin. The composite polypropylene resin, polyhydroxybutyrate, polylactic acid, and cross-linking agent are blended and cast into a base film blank with a thickness of 0.1-1 mm. The matting agent and the slip agent are mixed uniformly, melt-extruded and formed, and then added to the base film blank to obtain a matting blank. The matting blank is biaxially stretched at 80-90 °C, the stretching speed is 40-70 mm / s, the stretching ratio is 4-10, and the stretched blank is irradiated with an electron beam in a nitrogen atmosphere to obtain the degradable high-barrier composite BOPP matting film.