1251 results about "Melt extrusion" patented technology

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.

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 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 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 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 relates to the field of cable sheath material preparation, in particular to a high-temperature-resistant cable sheath material and a preparation method thereof. The method comprises the following steps: performing vacuum drying on a matrix polymer, a heat-resistant filler and a functional additive, mixing, and adding an interfacial compatibilizer to obtain a premix; carrying out mechanical activation treatment on the premix, carrying out segmented temperature control melt blending extrusion by using a twin-screw extruder, cooling and pelletizing to obtain master batches; after the master batch is subjected to pre-crystallization treatment, the master batch is subjected to melt extrusion through a single-screw extruder and is coated on the surface of a cable conductor to form a sheath layer; and the sheath layer is subjected to segmented heating cross-linking reaction and gradient cooling solidification, and is finally rolled and stored. According to the method, by optimizing the material ratio and process parameters, the high temperature resistance, mechanical strength and stability of the sheath material are enhanced, and the sheath material is suitable for being applied to cables in a high-temperature environment.

The invention discloses a wear-resistant and high-temperature-resistant polyester fiber and a preparation method thereof, belongs to the technical field of polyester processing, and aims to solve the technical problem that wear resistance and high-temperature resistance of polyester fibers in the prior art need to be further improved. Carrying out melt extrusion and spinning to obtain a polyester fiber precursor; the preparation method comprises the following steps: modifying an epoxy group on a carboxylated carbon nanotube through a free radical polymerization reaction to obtain a modified filler, carrying out melt spinning on the modified filler, an auxiliary additive and modified PET to obtain a polyester fiber precursor, preparing a modified antibacterial agent through a coprecipitation method, further preparing an antibacterial solution, and carrying out melt spinning on the antibacterial solution to obtain the antibacterial polyester fiber. The polyester fiber precursor is soaked in the antibacterial liquid to obtain the polyester fiber, so that the wear resistance and the high temperature resistance of the polyester fiber are improved, and the antibacterial performance of the polyester fiber is also improved.

The invention relates to the technical field of optical films, and discloses a PET-based composite optical film and a preparation method thereof.The optical film is prepared from 100 parts of PET master batch, 5-10 parts of anti-blue-light nanofiller and 1-3 parts of interfacial compatibilizer through melt extrusion, asynchronous two-way stretching, online anti-fingerprint coating liquid coating and cooling and rolling; the blue-light-resistant nano filler is a core-shell structure filler prepared by taking KH570 silanized nano cerium oxide as a core, polymerizing by grafting glycidyl methacrylate to form a shell layer, and then reacting with 1H-benzotriazole-1-methanol. The anti-fingerprint coating liquid is prepared from perfluoropolyether modified siloxane acrylate and nano silicon dioxide sol. Through core-shell filler design and functional coating online coating, the technical problems that inorganic nanoparticles are easy to agglomerate and organic small molecule auxiliary agents are easy to migrate are synergistically solved, and the obtained optical film has excellent properties of high light transmittance, low haze, efficient blue light resistance and lasting fingerprint resistance and is good in durability.

The invention discloses a halogen-free compound flame retardant and application thereof in an antistatic nylon 66 composite material, and belongs to the technical field of polymer composite materials. The halogen-free compound flame retardant is prepared by compounding 68 parts of an organic aluminum hypophosphite flame retardant, 20 parts of a nitrogen-phosphorus intumescent flame retardant, 10 parts of a two-dimensional layered inorganic substance and 2 parts of a coupling agent through a high-speed mixing and drying process. The halogen-free compound flame retardant is blended with nylon 66, reinforced fibers, an antioxidant and the like, and the composite material is prepared through melt extrusion. According to the compound system, the total dosage of the flame retardant is remarkably reduced, the V-0 flame retardant grade is still achieved under the condition that the thickness is 0.8 mm, and the limit oxygen index exceeds 32%. The composite material has excellent flame retardancy and antistatic property while maintaining good mechanical properties, is suitable for a high glass fiber content system, effectively solves the problems of high flame retardant addition amount, difficult processing, high cost and the like in the prior art, and has the advantages of simple process and excellent comprehensive performance.

The invention provides a polymer foam product, a preparation method thereof and a shoe material, and belongs to the technical field of 3D printing. The preparation method comprises the following steps: firstly, carrying out melt extrusion on a thermoplastic resin mixed material, and carrying out 3D printing on the obtained thermoplastic resin composite material according to a planned path to obtain a polymer workpiece; the preparation method comprises the following steps: firstly, soaking a polymer workpiece in a solvent, and finally, soaking the soaked polymer workpiece in supercritical fluid, and foaming to obtain a polymer foam product. By adopting the method provided by the invention to prepare the polymer foam product, the polymer foam product with low apparent density, low compression permanent deformation, high rebound resilience and high tensile strength can be obtained.

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 application discloses a kind of cable filling rope with halogen-free flame-retardant composite material and preparation method thereof, belong to composite material technical field.The application is used to solve the technical problems of poor cell quality, poor mechanical properties and flame-retardant properties of filling rope material in the prior art.A kind of preparation method of cable filling rope with halogen-free flame-retardant composite material includes the following steps: low-density polyethylene, high-density polyethylene, hybrid flame-retardant resin and modified nucleating agent are uniformly mixed to obtain foaming filling rope material;Foaming filling rope material is melt extruded to obtain cable filling rope with halogen-free flame-retardant composite material.The hybrid flame-retardant resin is obtained by reaction of polycyclic epoxy group cyclotriphosphazene, vinyl chloride methyl methacrylate copolymer, mixed inorganic powder, etc.;The modified nucleating agent is obtained by intercalating talc powder with modified diamide nucleating agent.The foaming filling rope material prepared by the application has the characteristics of high cell quality, excellent mechanical properties and flame-retardant properties.

The invention belongs to the technical field of high polymer material processing, and particularly relates to a melt extrusion molding method of an ultra-high molecular weight polyethylene wide sheet. Aiming at the technical bottlenecks of poor melt flowability, extrusion fracture and the like caused by molecular chain entanglement of UHMWPE, continuous and stable extrusion of UHMWPE wide sheets is realized by compounding a specific flow modifier and combining a stepped precise temperature control strategy and a forced symmetric cooling process. According to the method, the melt fracture phenomenon is eliminated, the intrinsic performance such as high wear resistance and low temperature resistance of UHMWPE is completely reserved, the efficiency and size limitation of a traditional mold pressing process is broken through, and a large-scale production solution of high-performance sheets is provided for the high-end fields such as food machinery and medical implants.

An antibacterial polymer having a molecular weight above a certain level, which is highly miscible with other polymers compared to a monomolecular type antibacterial agent and can be added during the melt extrusion process. Further the antibacterial polymer has the advantage of exhibiting excellent antibacterial properties against Gram-negative bacteria and does not elute over time.

The invention relates to the technical field of lithium ion battery composite current collector materials, in particular to a high-strength PP base film and a preparation method thereof. The invention aims to solve the technical problems of poor stability, unbalanced strength and toughness and insufficient surface adhesive force of the PP base film caused by punching processing in current collector preparation of the PP base film. The preparation method comprises the following steps: reacting nano silicon dioxide with maleic anhydride grafted polypropylene to form nano particles with core-shell structures, reacting the nano particles with homo-polypropylene resin to prepare high-content nano reinforced PP master batches, blending the master batches with the homo-polypropylene resin, and carrying out melt extrusion and two-way stretching to obtain a formed PP base film; and carrying out three-layer gradient coating on the formed PP base film, and curing to obtain the high-strength PP base film. The high-strength PP base film disclosed by the invention has excellent mechanical strength and keeps good toughness and adhesive force.

The invention discloses an impact-resistant cross-linked polyolefin composite cable material and a preparation method thereof, belongs to the technical field of cable material processing, and aims to solve the technical problem that the impact resistance and flame retardance of a cable material in the prior art need to be further improved. The flame-retardant polypropylene composite material specifically comprises the following components in parts by weight: 60-80 parts of modified polypropylene, 20-25 parts of a modified flame retardant, 5-8 parts of modified magnesium hydroxide, 10-15 parts of an ethylene-octylene copolymer, 1-2 parts of a chain extender, 0.5-1 part of an initiator and 8-12 parts of an auxiliary additive. The cross-linked polypropylene, the modified flame retardant, the modified magnesium hydroxide, the ethylene-octylene copolymer and the auxiliary additive are added into a double-screw extruder for melt extrusion and granulation to obtain the composite cable material, so that the impact resistance and flame retardance of the cable material are improved, and the toughness of the cable material is also improved.

The invention belongs to the technical field of textile material processing, and particularly discloses a preparation method of high-strength low-shrinkage composite yarn for spinning. A preparation method of a high-strength low-shrinkage composite yarn for spinning comprises the following steps: (1) respectively drying ultra-high molecular weight polyethylene and PET polyester, adding maleic anhydride grafted PE, a treated metal organic framework material, boron carbide nanoparticles, cellulose acetate and a silane coupling agent KH550, uniformly mixing, and carrying out melt extrusion to obtain nascent fibers; (2) performing first-stage pre-drafting, second-stage high-temperature tension field drafting and third-stage low-temperature relaxation treatment on the nascent fiber to obtain treated fiber; and (3) dipping the treated fiber in an ethanol solution containing nano SiO, and performing infrared radiation curing to obtain the high-strength low-shrinkage composite yarn for spinning. The composite yarn has good mechanical strength, wear resistance and low contractibility, and the yarn has wide application due to the high breaking strength.

The invention belongs to the technical field of coatings, and discloses a preparation method and application of a low-temperature fast-curing coiled material powder coating, and the preparation method comprises the following steps: S1, adding raw materials of the low-temperature fast-curing coiled material powder coating into a high-speed mixer, and mixing for 5-8 minutes at the rotating speed of 1200-1600r / min to ensure that the components are uniformly dispersed; s2, adding the mixture into a double-screw extruder for melt extrusion, wherein the temperature of the double-screw extruder is 80-90 DEG C in a first area, 100-110 DEG C in a second area, 120-130 DEG C in a third area and 110-120 DEG C in a fourth area, and the rotating speed is 200-250 r / min; s3, tabletting and cooling to 40 DEG C or below, after coarse crushing, adopting an ACM pulverizer and a grading screen of 80-120 meshes to obtain the low-temperature fast-curing coiled material powder coating, low-temperature curing and fast film forming are achieved through component cooperation, the process adaptability is high, meanwhile, functional filler modified sericite and modified nanometer aluminum oxide are added, and the low-temperature fast-curing coiled material powder coating is prepared. The two synergistically enhance the corrosion resistance, mechanical strength and environmental adaptability of the powder coating paint film.

The invention discloses optical-grade PMMA (polymethyl methacrylate) and a continuous polymerization process method and application thereof, the continuous polymerization process method comprises a pre-polymerization stage, a body continuous polymerization stage, a four-stage vacuum devolatilization stage and a melt extrusion stage, through special design of temperature programs and the like in the technological process, the prepared PMMA can reach the optical grade, and the optical-grade PMMA can be used for preparing the optical-grade PMMA. The method has the advantages of high light transmittance, narrow molecular weight distribution, and realization of large-scale industrial production.

The present application provides an extrusion-type 3D printing filament and a preparation method therefor. The filament comprises a first material and a second material, and the first material and the second material each have a radial gradient distribution. The radial gradient distributions in the chemical composition solve the problem of interfacial incompatibility of the materials, and avoid interfacial defects in the filament and printed objects; during the melt extrusion process, laminar flow enables the radial gradient distribution structure in composition to be kept, and the radial gradient distribution structure is beneficial to improving rheological stability.

The invention relates to the technical field of fiber materials, in particular to a polydopamine modified polypropylene antistatic fiber and a preparation method thereof. The antistatic polypropylene fiber overcomes the problems of poor antistatic effect and mechanical property of the polypropylene fiber. The preparation method comprises the following steps: carrying out step-by-step mixing, melt extrusion, spinning, drafting and heat setting on raw materials such as polypropylene slices, polydopamine modified polypropylene, carbon nanotubes, modified titanium dioxide, modified graphene and the like to obtain the antistatic fiber. The polydopamine modified polypropylene is obtained by modifying polypropylene with dopamine hydrochloride; the modified titanium dioxide is obtained by modifying nano titanium dioxide by using 3-aminopropyltriethoxysilane; the modified graphene is obtained by sulfonating graphene oxide and adding octadecylamine for modification. All the materials and the process cooperate with each other, an antistatic system is constructed on the surface and in the fiber, and meanwhile the mechanical property is improved. The fiber prepared by the method is excellent in antistatic effect and mechanical property, and has a good application prospect.

The invention relates to the technical field of polymer functional material processing, and particularly discloses a polyethylene waterproof breathable film using PTFE micro powder as an opening agent and a preparation method of the polyethylene waterproof breathable film. The waterproof breathable film is prepared from the following components in parts by weight: 50-70 parts of linear low-density polyethylene, 10-40 parts of PTFE (Polytetrafluoroethylene) micro powder, 3-8 parts of a modified compatilizer and an auxiliary agent. The preparation method comprises the following steps: S1, activating PTFE micro-powder by a silane coupling agent and coating the PTFE micro-powder with polyethylene wax to obtain modified micro-powder; s2, uniformly mixing all the components; s3, carrying out melt extrusion at 180-210 DEG C through a double-screw extruder, and carrying out tape casting to form a cast sheet; s4, the casting piece is heated to 90-115 DEG C for two-way stretching, and micropores are formed through interface stripping between the PTFE particles and the base body; and S5, carrying out heat setting at 120-130 DEG C, cooling, and rolling to form the film. Through the synergistic effect of the self-made compatilizer and the pretreatment process, the interface anchoring force is enhanced, the problems of powder falling and water leakage of highly-filled PTFE are solved, and meanwhile, high moisture permeability, high hydrostatic pressure resistance and high mechanical property are taken into account.