7946 results about "Polypropylene" patented technology

The invention relates to the technical field of EPP (foamed polypropylene) production and manufacturing, and discloses an EPP foaming process parameter optimization method which comprises the following steps: monitoring temperature field and pressure changes in real time, and judging whether a thermodynamic state deviates from a preset window or not; during deviation, constructing a multi-physics field coupling model to evaluate a bubble growth dynamic unbalance risk, and identifying micro-pore non-uniform distribution characteristics through multi-source sensing data fusion and frequency domain analysis; and judging whether the technological parameters are globally coordinated and regulated based on risks and characteristics, analyzing the heat transfer and heat radiation influence of the temperature control unit, quantifying the parameter regulation sensitivity and determining the regulation priority. The system comprises a thermodynamic monitoring module, a dynamic coupling analysis module and the like. According to the invention, real-time monitoring, accurate analysis and intelligent regulation and control of the EPP foaming process are realized, the process stability and the product quality are improved, and the method is suitable for the field of EPP production and manufacturing.

The invention discloses an intelligent operation abnormity monitoring and positioning method for a polypropylene cable, and relates to the technical field of intelligent operation and maintenance of a power system, and the method comprises the steps: collecting multi-source physical signals in the operation process of the cable, and constructing a multi-dimensional feature matrix fusing multiple physical quantities through multi-scale time window division and space mapping processing; extracting space-time coupling characteristics among nodes by using a graph attention embedding network, and training a running state recognition model in combination with a label perception contrast learning mechanism; constructing a cable topological graph based on an identification result, introducing an improved Bayesian space reasoning network, and calculating abnormal probability distribution of each node; a weighted abnormal heat map is further generated, an abnormal propagation path is extracted through an abnormal state flow model and a directional propagation scoring algorithm, and abnormal node positioning and trend evolution prediction are achieved; the method has the advantages of high spatial resolution, high identification precision and good online adaptability, and is suitable for intelligent state perception and abnormity early warning of the polypropylene cable in a complex operation environment.

This application relates to an EPP material and a folding mat using this EPP material, which relates to the field of EPP material technology. The EPP material is formed into a plate by welding EPP particles, and the surface of the plate is coated with a hydrophobic antibacterial paint. The raw materials for preparing the EPP particles include 80-100 parts by weight of polypropylene resin, 1-3 parts by weight of a nucleating agent, 6-8 parts by weight of a modified graphene composite material, 5-10 parts by weight of a flame retardant, 5-15 parts by weight of a reinforcing agent, and 0.5-1.5 parts by weight of a surfactant. The raw materials for preparing the modified graphene composite material include hydrophobic modified graphene oxide, hydrophobic antibacterial nano-zinc oxide, and a modified ammonium polyphosphate coupling agent. The folding mat using this EPP material includes an EPP material, a surface layer, and a sewing thread, and the surface layer and the EPP material are fixedly connected by the sewing thread. This application has the effect of improving the flame retardancy, waterproofness, and antibacterial properties of EPP material, and the resulting tatami mat is environmentally friendly, comfortable, and has a good user experience.

The invention discloses a high-temperature-resistant, high-voltage-resistant and anti-breakdown capacitor base film and a preparation method thereof. The high-temperature-resistant, high-voltage-resistant and anti-breakdown capacitor base film is prepared from the following raw materials in parts by weight: 100 parts of polypropylene; 17 to 36 parts of polyvinylidene fluoride; 3-12 parts of enhanced and improved talcum powder; 1-6.5 parts of modified barium titanate; 1-6 parts of a cross-linking agent; 2-10 parts of a compatilizer; and 0.05-2 parts of an initiator. The capacitor base film is high in mechanical strength, and has excellent high temperature resistance, thermo-oxidative aging resistance, high voltage resistance and anti-breakdown performance; the enhanced and improved talcum powder is constructed by taking expanded layer modified talc as a carrier and titanium dioxide-carbon dot composite particles as a loading component and grafting and coating the organic matter, so that the defects of the talcum powder can be overcome, and the improvement effect of the talcum powder on heat resistance, high-voltage resistance and breakdown resistance can be fully exerted; meanwhile, the system can be endowed with excellent thermo-oxidative aging resistance.

The invention discloses a training method and device of a polypropylene film defect detection model and a polypropylene film defect detection method, and relates to the field of industrial film detection.The training method comprises the steps that a film training image is obtained, and a pseudo label is generated through a pseudo label model; carrying out iterative training on the polypropylene film defect detection model based on the film training image and the pseudo label; wherein the construction process of the pseudo-label model comprises the steps of obtaining a labeled data set and an unlabeled data set, inputting the labeled data set and the unlabeled data set into a pseudo-label model to be trained, generating a predicted value according to the labeled data set through a student network, and calculating supervised loss; determining teacher network parameters according to the student network parameters; generating predicted values according to the unlabeled data set through the student network and the teacher network, and calculating consistency loss; all loss values are added to determine the total loss; and continuously adjusting the student network parameters until the total loss converges to obtain the network parameters of the pseudo-label model. By implementing the method and the device, the labeling cost can be reduced.

The invention relates to the technical field of high polymer materials, in particular to ethylene-vinyl acetate copolymer modified polypropylene high-toughness plastic particles and a preparation process thereof. The composite material is prepared from the following raw materials in parts by weight: 60 to 80 parts of polypropylene, 15 to 30 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of maleic anhydride-2-ethylhexyl acrylate copolymer grafted ethylene-vinyl acetate copolymer, 3 to 8 parts of nano silicon dioxide / graphene quantum dot composite filler, 5 to 12 parts of polyolefin elastomer, 0.5 to 2 parts of antioxidant and 0.5 to 2 parts of lubricant. The content of vinyl acetate in the ethylene-vinyl acetate copolymer is 20-33 wt%, the composite filler is modified through a silane coupling agent KH-560, the grafting rate of the grafted ethylene-vinyl acetate copolymer is 1.5-3.5 wt%, and the composite filler is prepared through a melt grafting method. Through multi-component collaborative design and process optimization, the low-temperature toughness, rigidity, heat resistance and aging resistance of the material are improved, the problems of rigidity and toughness imbalance, low-temperature brittleness, poor stability and the like of a traditional modification system are solved, and the material is excellent in comprehensive performance and wide in application range.

The invention discloses a high-bonding-strength flame-retardant composite current collector base film and a preparation method thereof. The high-bonding-strength flame-retardant composite current collector base film is prepared from the following raw materials in parts by weight: 100 parts of PP resin, 1.5 parts of a lubricant, 0.8 part of an antioxidant and 16 parts of reinforced flame-retardant composite particles, the reinforced flame-retardant composite particles are prepared by the following steps: S1, preparing amidated porous carbon microspheres; s2, compounding the amidated porous carbon microspheres with mica powder to prepare a composite carrier; s3, loading a flame retardant to prepare a flame-retardant compound; s4, in-situ grafting of maleic anhydride grafted polypropylene is carried out, and the reinforced flame-retardant composite particles are obtained. By adding the reinforced flame-retardant composite particles into the PP resin, the flame retardance and mechanical strength of the PP-based composite current collector base film and the interface bonding force between the PP base film and the metal conductive layer can be comprehensively improved.

The invention discloses a preparation method of an interface-modified flame-retardant polypropylene-based bamboo-plastic composite material. According to the method, a modification solution composed of a polyphenol component and a boron-containing component is adopted, bamboo powder is treated under the normal-temperature stirring condition, and the interface modified bamboo powder is successfully prepared. The mechanism is that polyphenol and a boron-containing component are subjected to a coordination reaction on the surface of bamboo powder, and a reversible borate dynamic covalent bond is constructed. The dynamic bond has a temperature response characteristic: reversible dissociation is realized during high-temperature processing, so that the melt viscosity of a composite system is reduced, and the processing fluidity is improved; the interface bonding force between the bamboo powder and the polypropylene matrix and the mechanical strength of the composite material are remarkably enhanced. In addition, the introduced boron element is used as an efficient flame-retardant component and promotes generation of a compact protective carbon layer during combustion, so that the flame-retardant property of the composite material is comprehensively improved.

The invention discloses a plastic hollow plate and a manufacturing method thereof, the plastic hollow plate comprises the following components by weight: 30%-60% of a polypropylene matrix and 40%-70% of phosphogypsum powder, and polypropylene provides thermoplastic formability and toughness. The preparation method specifically comprises the following steps: 1) pretreating ardealite; 2) melt blending granulation; (3) forming a hollow plate; and 4) post-processing. The ardealite hollow plate has the advantages that the ardealite filling amount is increased, meanwhile, the bending strength and impact strength of a traditional hollow plate are improved, and the performance is improved by 20% or above compared with that of a traditional hollow plate with the same filling amount; the moisture content of the pretreated phosphogypsum is less than 6%, so that bubbles in the processing process are avoided, and the interface bonding strength is improved; the comprehensive utilization rate of industrial byproduct phosphogypsum is improved, and the production cost is reduced.

The invention belongs to the technical field of thin film capacitors, and particularly relates to a chemical grafting modified polypropylene capacitor film material and a preparation method and application thereof. According to the preparation method of the chemical grafting modified polypropylene capacitor film material, provided by the invention, diethylenetriamine ethyl acrylate with a plurality of specific groups such as amino groups and carboxyl groups and unsaturated double bonds is synthesized through esterification reaction, and the diethylenetriamine ethyl acrylate is introduced into a polypropylene material through chemical grafting to obtain chemical grafting modified polypropylene; the prepared polypropylene capacitor film material has the excellent properties of good compatibility, difficulty in film breakage, capability of adsorbing and removing residual moisture, difficulty in oxidation corrosion, excellent breakdown resistance and the like, and the preparation method is a preparation method of the high-performance polypropylene capacitor film material; therefore, the technical problem that a polypropylene capacitor film material prepared in the prior art is low in performance is solved.

The invention discloses a microporous diaphragm for a low-electrical-impedance lithium battery and a preparation method of the microporous diaphragm. The diaphragm comprises: a base film layer, wherein the base film layer is of a microporous structure formed by biaxially stretching polypropylene and / or polyethylene; the surface of the base film layer is coated with the functional coating, and the functional coating contains mixed slurry of inorganic nanoparticles and a binder; the surface modification layer is formed by introducing a hydrophilic electrolyte group on the surface of the functional coating through plasma treatment or chemical grafting. The base membrane layer forms a uniform micropore structure through a two-way stretching process, the functional coating is formed by compounding nano silicon dioxide or aluminum oxide and polyvinylidene fluoride according to a specific proportion, a porous layer with gradient pore diameter is formed, the pore size of the porous layer is smaller than that of the base membrane layer, and efficient permeation of electrolyte is ensured. Electrolyte-philic groups such as sulfonic groups are introduced into the surface modification layer, so that the wettability of the diaphragm to an electrolyte is remarkably improved. During preparation, the base membrane is formed through melt blending, two-way stretching and pore-forming agent extraction, and then the functional layer is constructed through slurry coating and a low-temperature plasma treatment or sulfonation process. The diaphragm combines gradient aperture design, inorganic filler enhancement and surface chemical modification, and realizes low impedance, high thermal stability and excellent mechanical strength.

In some embodiments, a cable can include an electrically conductive inner core. A first insulation layer can be disposed about the inner core. An electrically conductive layer can be disposed about the first insulation layer. A second insulation layer can be disposed about the electrically conductive layer. A first polymer jacket can be disposed about the second insulation layer. The first polymer jacket can include a first layer of armor strength members disposed therein. A second polymer jacket can be disposed about the first polymer jacket. The second polymer jacket can include a second layer of armor strength members disposed therein. An outer polymer jacket can be disposed about the second polymer jacket. At least one of the first polymer jacket, the second polymer jacket, and the outer polymer jacket can be formed from an aliphatic polyketone polymer, an ethylene-propylene copolymer, a polyolefin elastomer, a polypropylene, or a cross-linkable polyethylene.

The invention discloses a seed priming method for improving early-stage disease resistance of pepper seeds, which belongs to the field of agricultural planting and comprises the following steps: S1, pre-cleaning: soaking the seeds with sodium hypochlorite and then cleaning the seeds with sterile deionized water; s2, pulse phosphorylation activation treatment: adding seeds and an activation solution into a pressure-resistant polypropylene container connected with a vacuum pipeline, sealing, vacuumizing to-0.08 MPa, maintaining for 5-10 minutes, then recovering to normal pressure, transferring to a constant-temperature oscillator, and carrying out phosphorylation activation treatment; s3, immune training treatment: transferring the seeds subjected to phosphorylation activation treatment to an initiation solution containing UV-inactivated phytophthora capsici spore suspension and H2O2, and carrying out intermittent ventilation treatment; s4, stabilizing treatment: transferring the seeds subjected to immune training treatment into an ascorbic acid solution for treatment, filtering, and drying in the shade to obtain the pepper seeds. According to the invention, the problem of immune response interruption caused by insufficient signal intensity and fast protein turnover when a simulated environment is used for excitation in the prior art is solved.

The invention relates to a high-barrier polypropylene medical material and a preparation method thereof, and belongs to the technical field of high polymer materials. The medical material is prepared from the following components in percentage by weight: 2.2 to 3.5 percent of modified graphene, 0.35 to 0.4 percent of antioxidant, 0.6 to 0.8 percent of lubricant and the balance of polypropylene resin, the modified graphene induces polypropylene to generate a beta crystal extension area along the lamellar edge, an inorganic-organic barrier surface is formed, the shielding barrier effect is improved, the tortuosity degree of a permeation path is increased, and the core technical problems that large-lamellar graphene is difficult to disperse and small-lamellar graphene is difficult to form a large shielding barrier layer are solved; the beta-phase polypropylene formed at the edge of the graphene has excellent toughness, the toughness gradient of the graphene and a polypropylene matrix is weakened, the defects between interfaces are reduced, and the stability of the barrier property is improved.

The invention relates to the technical field of electric wires and cables, discloses a high-elasticity waterproof cable based on blending of water-blocking powder and an elastomer, and aims to solve the problems that in the prior art, during long-term dynamic service, interlayer separation is easily caused by interfacial stress superposition, so that elasticity attenuation and waterproof barrier damage are caused, and the service life is affected. According to the invention, the sodium polyacrylate water-blocking powder is subjected to composite modification and is blended with an elastomer matrix, modified nano silicon dioxide is matched for dispersion, an inner and outer layer gradient insulation structure is designed, and ultrasonic dispersion, nitrogen protection steam cross-linking and other processes are combined; the cable is sequentially provided with the conductor layer, the conductor shielding layer, the gradient insulation layer, the insulation shielding layer and the sheath layer from inside to outside, interface stress concentration is reduced, interlayer combination stability is enhanced, and the cable can still keep excellent elastic recovery capability and waterproof barrier integrity under high-frequency torsion and repeated dry-wet cycles.

The invention discloses a dry-process high-temperature-resistant lithium battery diaphragm and a preparation method thereof, and relates to the technical field of lithium battery diaphragms. The specific preparation method comprises the following steps: activating and cross-linking polypropylene, polyimide, a PP-b-PI block copolymer and a cross-linking agent BIBP under the protection of nitrogen to prepare a polypropylene-polyimide matrix; after melting, adding a pre-sintered ZrO2-coated Al2O3 core-shell filler, hydroxylated boron nitride and zinc borate, and carrying out double-stage screw extrusion, ultrasonic orientation, nitrogen annealing and cold roller quenching to obtain a mixed melt; carrying out warm stretching and hot air circulation heat treatment to prepare a hard elastic crystal base film; carrying out stretching, thermal relaxation and thermal shaping to obtain a microporous base membrane; after slitting, plasma activation is carried out, epoxy silane and tetraethyl orthosilicate / polybenzimidazole aerogel precursors are sprayed, and a nano closed-pore coating is formed through pre-curing and heat shrinkage curing; and finally eliminating static electricity and rolling to obtain a finished product. The lithium battery diaphragm prepared by the invention is excellent in high temperature resistance and low in thermal shrinkage rate.

The invention relates to the technical field of fibers, and discloses an antistatic warm-keeping fiber and a preparation method thereof. The preparation method comprises the following steps: carrying out graft modification on a far infrared material graphene oxide through functionalized POSS, introducing the modified graphene oxide and an ionic liquid into polypropylene, carrying out melt grafting to prepare an antistatic polypropylene master batch, introducing the master batch into polypropylene slices for spinning, and carrying out a synergistic antistatic effect of an inorganic antistatic agent graphene and an organic antistatic agent ionic liquid to prepare a composite material. The prepared fiber has antistatic performance and far infrared heating performance, and meanwhile, the POSS structure with excellent thermal stability is introduced, so that the heat resistance of the fiber is further improved.

The invention relates to the technical field of medical dressings, in particular to a perianal drug dressing of a multi-layer flow guide composite fabric and a preparation method and application of the perianal drug dressing of the multi-layer flow guide composite fabric. The perianal drug dressing is of a four-layer structure, a wet tissue adhesion layer is made of polydopamine modified chitosan / oxidized hyaluronic acid hydrogel, and wet-state adhesion is achieved; the drug sustained-release layer is used for dispersing mesoporous silica loaded with ciprofloxacin hydrochloride / defensin and chitosan microspheres loaded with epidermal growth factors / lonicera japonica into a polycaprolactone fiber membrane to achieve synergistic antibacterial and healing promotion; the directional flow guide layer is of a gradient wettability sandwich structure with a bionic micro-channel, and one-way rapid drainage can be achieved; the high-absorption outer layer is carboxymethyl cellulose / sodium polyacrylate composite sponge, liquid is locked efficiently, the wound surface is kept dry and comfortable, the clinical problem in perianal infection wound treatment can be effectively solved, and the treatment effect and the patient comfort are remarkably improved.

The invention relates to the technical field of capacitor films. The invention discloses a preparation process of a multilayer polypropylene capacitance film, which comprises the following steps: S1, raw material preparation: preparing basic resin, a nano ceramic filler, a nucleating agent and an antioxidant into multilayer raw materials respectively; s2, fusing multiple layers of raw materials by an independent screw extruder, and compounding by a co-extrusion die head to form a film blank; and S3, carrying out air ring gradient cooling on the film blank. And S4, longitudinally and transversely stretching the film blank. And S5, performing heat setting in a segmented heating furnace, and performing corona treatment to improve surface energy. And S6, segmentally curing the moisture-proof coating by using an infrared oven. The multilayer heterostructure is adopted, the comprehensive performance of the capacitor film is improved through material matching, the dielectric constant, the breakdown strength and the moisture resistance are enhanced, and the problem of considering the dielectric property and the mechanical property is solved. The innovative process guarantees stable performance, is compatible with an existing production line, can realize large-scale production, meets the requirements of fields such as new energy and the like, and provides a feasible scheme for localization of high-performance capacitor films.

To provide a lead with an insulating resin film with which, when applied to a battery, it is possible to eject a gas generated in a region sealed by the outer packaging of the battery to the outside of the region sealed by the outer packaging.SOLUTION: Provided is a lead with an insulating resin film comprising a conductor and an insulating resin film, wherein, when an axis extending along two sides facing each other is defined as an axis X and an axis crossing the axis X is defined as an axis Y with the conductor viewed from above, the insulating resin film is disposed so as to cover the conductor crossing it along the axis X and not to cover both ends of the conductor that are along the axis Y so as to extend off both ends of the conductor and overlap. The insulating resin film has a first layer being in contact with the conductor, and a second layer. The second layer includes a base resin composed primarily of polypropylene, and one or more kinds of additive component selected from a rubber component and an elastomer component. The melting point of the base resin is 110°C to 130°C inclusive, and the softening point of the additive component is 130°C or below. The second layer contains 10 mass% to 40 mass% inclusive of the additive component.SELECTED DRAWING: Figure 3A

The invention relates to the field of current collector membranes, in particular to a modified polypropylene base membrane and a preparation method thereof. The modified polypropylene base film is prepared from the following components in parts by weight: 100 parts of polypropylene resin, 5 to 15 parts of modified boron nitride nanosheets, 3 to 8 parts of an interface compatilizer, 10 to 20 parts of modified benzoxazine, 0.2 to 0.5 part of an antioxidant, 0.1 to 0.3 part of an ultraviolet light absorber and 0.2 to 0.5 part of a slipping agent. The modified polypropylene base film is prepared, polypropylene resin is used as a main material, modified boron nitride nanosheets, modified benzoxazine and other auxiliaries are introduced, a stable multi-phase structure is formed, and all the components have a synergistic enhancement effect; compared with a common polypropylene film, the polypropylene film has the advantages that the high temperature resistance, the mechanical strength, the flame retardance and the comprehensiveness are obviously improved.

The invention discloses a high-strength cable protection tube and a preparation method thereof, and relates to the technical field of cable protection tubes, the high-strength cable protection tube sequentially comprises a protection layer and a deformation heat conduction layer from outside to inside, and the protection layer comprises, by weight, 60-80 parts of polypropylene, 5-8 parts of an anti-wear agent, 3-5 parts of an antioxidant, 5-8 parts of external oxide powder, 5-8 parts of a toughening agent and 3-5 parts of talcum powder. The deformation heat conduction layer comprises the following components in parts by weight: 30-40 parts of a supporting material, 5-8 parts of internal oxide powder, 20-30 parts of silicone oil, 20-30 parts of zirconium tungstate and 10-20 parts of a supporting material. The deformation heat conduction layer is arranged on the inner wall of the protection layer, and the deformation heat conduction layer is composed of silicone oil, a supporting material and the like and can deform to make large-area contact with the cable placed in the protection layer, so that heat of the cable can be transmitted to the protection layer more quickly, and the heat can be transmitted to the outside more quickly; and the heat transfer efficiency to the outside is higher.

The invention relates to the technical field of BOPP (biaxially-oriented polypropylene) films, in particular to a scratch-resistant adhesive-free matt film and a preparation method thereof, and the scratch-resistant adhesive-free matt film comprises a matt layer, a core layer and a thermal composite layer which are sequentially arranged, the matt layer comprises co-polypropylene, high-density polyethylene, 2.0-2.5 wt% of linear alkyl silicone (the weight-average molecular weight is 12-150 thousands, and the surface tension is 42-45 mN / m) taking maleic anhydride modified aziridine as a terminal group, and 2000-4000 ppm of spherical polymethyl methacrylate (the particle size D50 is 4.0-5.0 microns); the core layer comprises homo-polypropylene; and the thermal composite layer comprises an ethylene-vinyl acetate copolymer and 2000 to 4000 ppm of a spherical anti-blocking agent. According to the scratch-resistant adhesive-free matt film, through collaborative design of the components of the matt layer and the thermal composite layer, balance of scratch resistance, high surface tension (printing applicability) and winding and unwinding smoothness of the surface of the matt layer is achieved, and a solution for the scratch-resistant generality problem of the matt surface of the high-end BOPP matt film is provided.

The invention discloses a polypropylene insulation high-voltage direct-current cable and a production method thereof, and relates to the technical field of cables, the polypropylene insulation high-voltage direct-current cable comprises an insulation layer, the insulation layer comprises an insulation part arranged between a conductor shielding layer and an insulation shielding layer, the insulation part is provided with a plurality of limiting holes communicated with the insulation shielding layer, the limiting holes are filled with phase change parts, and the phase change parts can transmit heat on the inner side of the insulation layer to the outer side of the insulation layer; and the cable can be converted between solid and liquid along with the temperature of the cable so as to fill an air gap between the insulating layer and the insulating shielding layer. The plurality of limiting holes are formed in the insulating part, the limiting holes are filled with the phase change parts capable of generating phase change at low temperature, and the temperature difference between the two sides of the insulating part is reduced through the heat conduction capability of the phase change parts, so that the problem of charge accumulation caused by the overlarge temperature difference between the two sides of the insulating part is avoided; and meanwhile, separation or air gaps between the insulating part and the insulating shielding layer are filled through phase change of the phase change part.

The invention relates to the field of cables, in particular to a rat-proof and termite-proof flame-retardant cable and a preparation method thereof, which are used for solving the problems of poor rat-proof and termite-proof effect and flame-retardant effect of the existing cable sheath material. According to the rat-proof and termite-proof flame-retardant cable sheath, the polyethylene resin, the polypropylene resin and the ethylene-vinyl acetate copolymer serve as main raw materials and are reasonably compounded, the advantages of the polyethylene resin, the polypropylene resin and the ethylene-vinyl acetate copolymer are synthesized, good basic performance is provided for the cable sheath, the basic magnesium sulfate whiskers and the boron-nitrogen-phosphorus complexing agent are added and coated, the basic magnesium sulfate whiskers and the boron-nitrogen-phosphorus complexing agent can cooperate with one another, and a multi-layer flame-retardant mechanism is formed; the flame-retardant performance of the cable sheath is remarkably improved, the safety of the cable in a fire disaster is improved, the mechanical property of the cable sheath is remarkably improved due to the existence of the coated basic magnesium sulfate whiskers, the damage to the cable caused by rat and ant biting is reduced, the rat and ant-proof agent is added into the cable sheath, the damage to the cable caused by rat and ant biting is further reduced, and the service life of the cable is prolonged. And normal operation of the cable in areas with frequent rat and ant activities is ensured.

The embodiment of the invention provides a polypropylene film defect detection method, equipment and a medium. The method comprises the following steps: screening normal samples in a polypropylene film image to construct an image data set; extracting multi-scale features of the polypropylene film image; performing channel attention and space attention calculation on the multi-scale feature to obtain a first feature; performing channel conversion on the first features of different scales to obtain second features of the same channel; performing nonlinear transformation and local spatial feature extraction on the second feature to obtain a third feature; performing defect detection and defect positioning according to the third feature to obtain a detection result; the prior that a large number of defect samples are needed in traditional detection is eliminated, and efficient defect detection can be achieved after learning of a large number of normal samples.

The invention belongs to the technical field of cement pole materials, and particularly relates to a high-strength cement pole material and a preparation method thereof. The high-strength cement pole material is prepared from the following components in parts by weight: 450 to 500 parts of cement, 60 to 80 parts of fly ash, 500 to 550 parts of fine aggregate, 800 to 1000 parts of coarse aggregate, 80 to 120 parts of slag powder, 30 to 50 parts of composite fiber, 5 to 10 parts of redispersible latex powder, 2 to 6 parts of water reducing agent and 100 to 150 parts of water, the composite fibers comprise modified basalt fibers and polypropylene reticular fibers. According to the high-strength cement pole material provided by the invention, the polypropylene reticular fibers and the specific modified basalt fibers act together, so that the cement pole material has high compressive strength and high breaking strength, and a cement pole prepared from the cement pole material has high flexural capacity.

The invention discloses an antibacterial non-woven fabric and a preparation process thereof, and belongs to the technical field of non-woven fabrics. Comprising the following raw materials in parts by weight: 60-70 parts of polypropylene resin, 10-20 parts of modified bamboo fibers, 5-8 parts of chitosan and 0.5-1.5 parts of an antioxidant. The chitosan and the bamboo fiber have certain antibacterial property, so that the antibacterial property of the non-woven fabric is improved; by modifying the bamboo fibers, the antibacterial performance of the non-woven fabric is remarkably improved, the compatibility of the bamboo fibers and a matrix is improved, meanwhile, micromolecular organic chains are grafted to the bamboo fibers, the migration resistance and seepage resistance of antibacterial components are remarkably improved, and the problems that according to a traditional coating method, falling is prone to occurring, and washing is not durable are solved; the bamboo fiber and the chitosan in the raw materials are natural and renewable materials and are environmentally friendly; in conclusion, the prepared non-woven fabric has stable and efficient antibacterial property, is environmentally friendly and has important application value in the technical field of non-woven fabrics.

The invention discloses a continuous fiber reinforced thermoplastic composite material and a preparation method thereof. The continuous fiber reinforced thermoplastic composite material comprises 35-40% of a polypropylene matrix with a melt index of 10-30 g / 10 min; 55% of continuous fibers are selected from glass fibers, carbon fibers or basalt fibers which are arranged in one direction, and the monofilament diameter is 9-15 microns; the intumescent flame retardant and the ammonium polyphosphate are compounded according to the mass ratio of 2: 1; 1-2% of an interface modifier, wherein a silane coupling agent KH-570 or PP-g-MAH is selected and used; the roughness Ra of the aluminum foil layer is 1.5-2.5 microns; under the condition of basically ensuring that the overall performance of the material is not greatly influenced, the application capability of the material is expanded, and the fireproof and flame-retardant capability of the material is improved, so that a thermoplastic composite material scheme can also be adopted under various harsh use conditions.

The invention relates to the technical field of injection molds, in particular to a PP (polypropylene) plastic injection mold for ABS (acrylonitrile butadiene styrene), which comprises a workbench, a feeding port, a heating system, a propelling system, a cavity body and a core body, and further comprises a propelling plate arranged on one side of the propelling system and used for mounting and pushing the core body to be attached to the cavity body; according to the PP plastic injection mold for the ABS, the four scraping rods which are arranged at the four corners of the mold core body at equal intervals are arranged on one side of the pushing plate, mold flashes on the outer side of the mold core body can be directly scraped, the flashes are effectively removed, and the appearance quality and the size precision of an injection product are improved; the scraping rod can slide in the rectangular groove or the circular groove according to the shape of the mold core body and the shape of the mold cavity body, linear and arc movement is achieved, the flash treatment requirements of molds of different shapes are met, and the universality of the molds and the flash treatment flexibility are improved.