1203 results about "POLYETHYLENE WAX" patented technology

The invention relates to a high-temperature-resistant nylon engineering plastic and a preparation method thereof, and belongs to the technical field of high polymer materials. The high-temperature-resistant nylon engineering plastic comprises the following components in parts by weight: 80-120 parts of nylon resin, 4-6 parts of inorganic filler, 4-6 parts of glass fiber, 2-10 parts of a heat-resistant modifier, 1-2 parts of a coupling agent, 1-3 parts of polyethylene wax, 0.5-1.5 parts of an antioxidant and 1-2 parts of a flame retardant, carbonyl and maleimide groups of the heat-resistant modifier strengthen intermolecular interaction and improve the glass transition temperature and the melting point, intermediate products 1 and 2 strengthen high temperature resistance, in addition, sulfonyl attracts electrons to strengthen thermal stability, tetrahydrofuran ring and acrylate are resistant to decomposition, and stability and water resistance are improved; boron and nitrogen of the flame retardant cooperate, a B-O-C carbon layer is formed at high temperature, flame-retardant gas is released, the flame-retardant property is remarkably improved, and the high-temperature-resistant nylon engineering plastic prepared by the preparation method has good high-temperature-resistant and water-resistant effects and also has excellent flame-retardant property.

The invention discloses a high-weather-resistance TPO waterproof coiled material and a preparation method thereof, and belongs to the technical field of high polymer materials. The waterproof coiled material is prepared from the following raw materials: high-density polyethylene, low-density polyethylene, an ethylene-octylene copolymer, ethylene propylene diene monomer, polypropylene, maleic anhydride grafted polyethylene, polyethylene wax, calcium carbonate powder, an antioxidant 1010, modified lignin, modified fumed silica and a modified nano inorganic composite light stabilizer. The tensile strength of the obtained waterproof coiled material is 20.3-21.3 MPa, the elongation at break is 602-621%, the tear strength is 69-77 N / mm, the low-temperature bending property is no crack at-40 DEG C, and the waterproof coiled material is very excellent in heat aging resistance, light aging resistance and artificial climate accelerated aging resistance.

The invention discloses an ultra-high molecular weight polyethylene fiber melt spinning method which comprises the following steps: step 1, mixing ultra-high molecular weight polyethylene resin with polyethylene wax and high-density polyethylene to form a composition; 2, melting the composition at a high temperature to form a melt, carrying out melt spinning, and carrying out nozzle stretching and air cooling to obtain nascent fibers; and step 3, carrying out hot stretching and heat setting on the nascent fiber to obtain the final ultra-high molecular weight polyethylene fiber. By adopting the technical scheme, the melt flowability of the ultra-high molecular weight polyethylene can be greatly improved by the high-density polyethylene and the polyethylene wax, so that the ultra-high molecular weight polyethylene resin can be smoothly subjected to melt spinning. Meanwhile, in the hot stretching process, the polyethylene wax can participate in the crystallization process of the ultra-high molecular weight polyethylene resin and the high-density polyethylene, and finally the mechanical property of the ultra-high molecular weight polyethylene fiber can be well maintained.

The invention relates to the technical field of cables, and provides a fireproof flame-retardant 10kV power cable and a preparation method thereof. The fire-resistant flame-retardant 10kV power cable comprises a conductor and a fire-resistant flame-retardant layer, the fireproof flame-retardant layer is prepared from the following raw materials in parts by weight: 35 to 45 parts of linear low-density polyethylene, 40 to 50 parts of ethylene-vinyl acetate copolymer, 25 to 30 parts of modified aluminum hydroxide, 5 to 8 parts of polyethylene grafted maleic anhydride, 10 to 12 parts of phosphate modified halloysite nanotube, 5 to 8 parts of ZIF-8 loaded zinc borate core-shell particles, 15 to 20 parts of magnesium hydroxide and 2 to 3 parts of silane coupling agent. 0.5 to 1 part of antioxidant, 0.5 to 1 part of calcium stearate and 1 to 1.5 parts of polyethylene wax. According to the cable prepared in the invention, the situation that a conductor is exposed and the fire resistance is lost due to cracking and falling under long-time high-temperature baking is avoided; the continuous effectiveness of the flame retardant at high temperature is improved.

The invention relates to the field of recycled concrete, and discloses a high-strength recycled concrete formula and a preparation method thereof, the high-strength recycled concrete formula comprises the following raw materials by weight: 180-240 parts of cement, 600-800 parts of hydrophobic modified recycled coarse aggregate, 180-280 parts of recycled fine aggregate, 400-600 parts of sand, 300-500 parts of fly ash, 60-120 parts of silica fume, and 20-30 parts of a water reducer, the modified waste rubber powder is prepared from, by weight, 25-35 parts of modified waste rubber powder, 10-40 parts of polyethylene wax, 2-4 parts of m-phenylenediamine and 12-16 parts of tetramethyl orthosilicate. In the invention, by using a large amount of recycled aggregate (coarse aggregate and fine aggregate), the exploitation of new natural resources is effectively reduced, the reutilization rate of building wastes is improved, and by optimizing the proportion and adding a plurality of modifiers (such as silica fume, fly ash, modified waste rubber powder and the like), the mechanical properties such as compression resistance, fracture resistance and the like of the concrete are remarkably improved; by adding the hydrophobic modified recycled coarse aggregate and the penetrant, the impermeability and durability of the concrete are enhanced, so that the performance and the application range of the recycled concrete are improved.

The invention discloses an anti-shrinkage light, soft and elastic sole foaming material and a preparation method thereof, and belongs to the technical field of footwear products. The light, soft and elastic sole foaming material is formed by chemically foaming an EVA (Ethylene Vinyl Acetate) composite raw material, the EVA composite raw material is prepared from 50 to 70 parts of EVA, 20 to 40 parts of olefin thermoplastic elastomer, 10 to 20 parts of styrene elastomer, 1.5 to 3 parts of maleic anhydride grafted ethylene-octylene copolymer compatilizer, 0.4 to 0.8 part of peroxide cross-linking agent, 3 to 4 parts of foaming agent, 1 to 1.5 parts of zinc oxide, 1 to 1.5 parts of polyethylene wax substance and 0.5 to 1.5 parts of poly (butylene succinate). 0.3 to 1 part of polyamide 12 microspheres and 2 to 3 parts of nano montmorillonite. The foaming material can resist shrinkage when being used as a shoe sole part, and has good rebound performance and the like, so that the high-quality requirement of sneakers, the mass production stability and the like are met.

The invention discloses water-based wear-resistant ink and a preparation method thereof, and belongs to the technical field of ink. The ink is prepared from the following components in parts by weight: 20 to 35 parts of waterborne polyurethane resin, 15 to 25 parts of waterborne acrylic resin with an acid value of 40 to 80 mg KOH / g, 5 to 15 parts of KH570 silane coupling agent modified nano aluminum oxide, 3 to 8 parts of polyethylene wax emulsion, 10 to 20 parts of pigment and auxiliaries. The preparation method comprises the following steps: firstly, carrying out surface modification on the nano aluminum oxide by using KH570, and then mixing, dispersing and grinding all the components. Through the synergistic effect of the acrylic resin with a specific acid value and the modified nano aluminum oxide, the problem that nano particles are easy to agglomerate in a system is solved, the nano particles can be stably dispersed, and the interface bonding with the resin is enhanced, so that the ink is endowed with excellent adhesive force, wear resistance and storage stability while the process is simplified and the cost is reduced; the BOPP film packaging material is especially suitable for BOPP film packaging materials.

The invention relates to the technical field of power cables, in particular to a heat-aging-resistant crosslinked polyethylene insulated power cable and a preparation method thereof. The cable comprises conductor wire cores, an insulating layer, a filling layer, a composite function layer, a steel tape armoring layer and a sheath layer from inside to outside. The insulating layer is composed of semi-conductive crosslinked polyethylene, silicone resin, nano montmorillonite and an HALS light stabilizer; the filling layer is composed of plasticized glass fabric, polyphenylene sulfide and rare earth oxide; the composite functional layer sequentially comprises a heat-conducting inner layer, a flame-retardant middle layer and an anti-UV outer layer from inside to outside; the sheath layer is composed of polyolefin, white carbon black, ceramic silicone rubber, a flame retardant, polyethylene wax and an initiator. According to the cable, cross-linked polyethylene and silicone resin are preferably selected as heat-resistant materials, heat conduction / flame retardance / UV resistance / armored multi-layer synergistic protection is achieved, the mechanical barrier performance is improved, meanwhile, damage of thermal stress to internal materials is reduced, comprehensive improvement of thermal aging resistance is achieved, and the cable is suitable for high-temperature, high-humidity and frequent thermal cycle harsh environments.

The invention discloses a preparation method of an ultra-high molecular weight polyethylene uniaxially oriented film, which comprises the following steps: step 1, mixing ultra-high molecular weight polyethylene resin and polyethylene wax to obtain a mixture; 2, melting the mixture at a high temperature to obtain a high-temperature melt; 3, the high-temperature melt is subjected to extrusion casting, and a primary film is obtained; and 4, carrying out uniaxial hot stretching on the primary film to obtain the final ultrahigh molecular weight polyethylene uniaxial oriented film. The melt flowability of the ultra-high molecular weight polyethylene is improved by utilizing the polyethylene wax, the polyethylene wax can participate in crystallization of the ultra-high molecular weight polyethylene by controlling the temperature in uniaxial hot stretching, and extended chain crystals in the ultra-high molecular weight polyethylene are reserved, so that the mechanical property of the ultra-high molecular weight polyethylene film is improved.

The invention relates to the technical field of cables, and provides a high-temperature-resistant flame-retardant power cable and a preparation method thereof. A high-temperature-resistant flame-retardant power cable comprises a conductor and a high-temperature-resistant flame-retardant outer layer wrapping the conductor. The high-temperature-resistant flame-retardant outer layer is prepared from the following raw materials in parts by weight: linear low-density polyethylene, an ethylene-vinyl acetate copolymer, ethylene propylene diene monomer, chopped polyimide fibers, nano-coated magnesium hydroxide, zinc borate, zinc stannate, polyethylene grafted maleic anhydride, an anti-aging agent, dicumyl peroxide, an antioxidant, polyethylene wax, calcium stearate and cerium dioxide. According to the cable prepared in the invention, the reliability of an existing high-temperature-resistant flame-retardant power cable under thermal cycle is improved, and the problem of local temperature resistance difference caused by agglomeration and high-temperature migration of nanoparticles in a polymer matrix is improved.

The invention relates to the technical field of cables, and provides an anti-aging insulated power cable. A conductor layer and an anti-aging outer sheath layer are sequentially arranged from inside to outside. The anti-aging outer sheath layer is prepared from the following raw materials in parts by weight: 55 to 65 parts of PVC (Polyvinyl Chloride) resin, 20 to 30 parts of ethylene propylene diene monomer, 10 to 15 parts of ethylene-vinyl acetate copolymer, 10 to 12 parts of modified kaolin, 18 to 20 parts of diisononyl phthalate, 4 to 5 parts of calcium-zinc composite stabilizer, 1.5 to 2 parts of antioxidant, 0.5 to 1 part of polyethylene wax and 0.5 to 0.7 part of calcium stearate; the modified kaolin is obtained by coating the surface of kaolin with nano silicon dioxide to obtain SiO2-coated kaolin and grafting the SiO2-coated kaolin with an ultraviolet absorbent. According to the anti-aging insulated power cable prepared in the invention, the problem that the ultraviolet absorbent may be decomposed, volatilized or migrated to fail in long-term use is solved, and the anti-aging stability of the insulating material in long-term operation is improved.

The invention relates to the technical field of polyethylene wax preparation, in particular to polyethylene wax with ultralow molecular weight, high crystallinity and narrow molecular weight distribution and a preparation method thereof.The preparation method comprises the steps that under the conditions that the temperature ranges from 60 DEG C to 180 DEG C and the pressure ranges from 0.5 MPa to 5.0 MPa, ethylene is introduced into a reaction device, an organic solvent is continuously added to serve as a medium, and the polyethylene wax with the ultralow molecular weight, the high crystallinity and the narrow molecular weight distribution is obtained; and adding alkyl aluminum halide and alkoxy titanium to carry out high-temperature solution polymerization reaction, and after the reaction is ended, cooling and drying to obtain the polyethylene wax. The polyethylene wax prepared by the invention has the characteristics of ultralow molecular weight, high crystallinity and narrow molecular weight distribution, and the molecular weight and the molecular weight distribution can be effectively adjusted in various modes, such as adjustment of substituent groups on phenyl or polymerization reaction conditions; meanwhile, compared with polyethylene wax in the prior art, the polyethylene wax produced by the process has remarkable advantages.

The invention discloses a water-based surface treatment liquid for a galvanized steel sheet. The water-based surface treatment liquid comprises deionized water and a solid, the solid component comprises the following components in parts by weight: 25-65 parts of water-based cationic polymer resin A in the solid component; the weight part of the compound organosilane coupling agent B in the solid components is 30 to 60 parts; the weight part of the compound lubricating particles C in the solid components is 3-10 parts; wherein the compound lubricating particles C comprise at least one organosilane coupling agent C1 containing unsaturated bonds; and a mixture of an oxidized polyethylene wax emulsion and a polytetrafluoroethylene wax emulsion; a water-soluble fluorine-containing compound D, wherein the weight part of the fluorine element in the solid is 1.5-5 parts; a water-soluble phosphorus-containing compound E, wherein the weight part of the phosphorus element in the solid is 1-3 parts; and a water-soluble salt compound F containing an eighth group iron element, wherein the weight part of the eighth group iron element in the solid component is 0.2-0.6 part.

The invention relates to the technical field of wax emulsions for yarn weaving, in particular to a wax emulsion which has spinnability, hand feeling and stability and is free of layer difference and a preparation method and application of the wax emulsion. The wax emulsion comprises a component A and a component B, wherein the component A is selected from two or more of oxidized modified polyethylene wax, fatty alcohol-polyoxyethylene ether and paraffin; the component B is prepared from the following components in percentage by weight: 2.5 to 5 percent of a cationic surfactant, 2.5 to 5 percent of a nonionic surfactant, 0.1 to 0.5 percent of an antibacterial agent, 0.5 to 1 percent of a pH regulator and the balance of water. The wax emulsion provided by the invention has excellent lubricating effect, softening effect and permeation effect, has no middle-outer layer difference and excellent stability, and does not influence the color light and fastness of a dyed fabric.

The invention discloses an anti-crack wear-resistant reflective enhanced hot-melt marking coating and a preparation method thereof. The marking coating comprises the following components: a film-forming substance, EVA (Ethylene Vinyl Acetate), titanium dioxide, glass beads, a filler, polyethylene wax, an anti-ultraviolet aging agent, anti-crack reinforced fibers, a wear-resistant reinforced material and white oil. The preparation method of the marking paint comprises the step of uniformly mixing the components to obtain the product. According to the anti-crack wear-resistant reflective enhanced hot-melt marking coating and the preparation method thereof, the problems that a hot-melt marking is cracked, is not wear-resistant, is not lasting in light reflection and the like are solved.

The invention discloses a UV (ultraviolet) excimer skin-touch paint for a relief melamine base material and application of the UV excimer skin-touch paint, and relates to the technical field of paints.The UV excimer skin-touch paint comprises the following components in percentage by weight: 15-50% of UV adhesion promoting resin; 5-10% of modified epoxy acrylate resin; 20 to 50% of special modified polyurethane acrylate resin; 5-20% of amino acrylate resin; 1-5% of phosphoric acid modified acrylate resin; 0.1-1% of a surface tension control agent A; 0.1-1% of a surface tension control agent B; 0.1-1% of a defoaming agent; 0.2-2% of an organosilicon hand feeling auxiliary agent; 0.1 to 0.5 percent of organic silicon leveling agent; 2-8% of a photoinitiator C; 0.3-1% of a wetting dispersant; 1-5% of polyethylene wax powder; and 10-30% of a UV active monomer. According to the invention, the relief melamine base material can realize open coating of the excimer skin-touch paint, and the coated paint film has good surface effect, uniform plate surface gloss without floating, no dust and no white exposure of the guide pipe, and good open effect.

The invention discloses a preparation method of an ultra-high molecular weight polyethylene biaxially oriented film, and relates to the field of high polymer materials, and the preparation method comprises the following steps: step 1, mixing ultra-high molecular weight polyethylene and polyethylene wax to obtain a composition; 2, melting and plasticizing the obtained composition, and extruding to form a thin-wall tubular film after melting and plasticizing; 3, the thin-wall tubular film is subjected to blowing, traction and rolling, and the final ultra-high molecular weight polyethylene film is obtained. The melt flowability of the ultra-high molecular weight polyethylene is improved by utilizing the polyethylene wax, and the polyethylene wax can participate in crystallization of the ultra-high molecular weight polyethylene by controlling the blow molding process, so that the mechanical property of the ultra-high molecular weight polyethylene biaxially oriented film is improved.

The invention provides a kit for single-hole detection of nucleic acids of various respiratory pathogens, and belongs to the technical field of pathogen detection, the kit comprises 2-5 primer combinations and a film-forming agent; the film-forming agent is polyethylene wax; each primer combination comprises a plurality of primer pairs, and the primer pairs are used for amplifying specific respiratory tract pathogen nucleic acid. According to the invention, the reaction is divided into two systems, the two systems are separated by a film-forming agent, amplification of the two reaction systems is carried out in the same reaction tube, after multiple amplification is completed, an isolating membrane is heated and melted, two groups of amplification products are mixed, and then the amplification products are detected. The multiplex RT-PCR kit which is good in detection specificity, high in sensitivity, good in repeatability and high in detection accuracy and can be used for simultaneously detecting various pathogenic bacteria is successfully constructed.

The invention relates to the field of package printing, in particular to a skin feeling effect printing method for cigarette case packaging paper. The printing method comprises the following steps that in the same offset printing equipment, 1) UV base oil printing is firstly conducted on the surface, printed with patterns and / or characters, of the cigarette case packaging paper; (2) after the step (1), printing a skin-touch ink layer; skin-touch ink adopted in the skin-touch ink layer is prepared from the following raw material components in parts by weight: 10 to 30 parts of first polyurethane resin, 60 to 80 parts of acrylate copolymer, 1 to 5 parts of polydimethylsiloxane, 1 to 5 parts of polyethylene wax, 1 to 5 parts of triethylamine and 40 to 50 parts of solvent. The printing method is achieved through one-time printing, UV base oil printing is conducted firstly, the leveling effect is obtained, the production efficiency is improved, the requirement for pre-printing file processing and the degree of dependence on equipment are reduced, the proofing difficulty is reduced, the water resistance, binding strength and abrasion resistance of an ink layer are improved, and the printing method has wide market application prospects.

The invention relates to the field of printing ink, and discloses UV fission printing ink for outer packaging of cigarette cases and a preparation method of the UV fission printing ink. The UV fission ink is prepared from the following raw materials in percentage by weight: 32 to 50 percent of polyurethane acrylate, 30 to 40 percent of functional monomer, 6 to 10 percent of active amine, 4 to 8 percent of photoinitiator, 6 to 8 percent of fission regulator, 2 to 4 percent of polyethylene wax, 0.5 to 1 percent of defoaming agent and 1.5 to 3 percent of flatting agent. The fission regulator is prepared from fumed silica, polydipentaerythritol hexaacrylate, a silane coupling agent and a dispersing agent. The UV fission ink prepared in the invention keeps good fluidity, irregular wrinkle structures or pattern edges formed by printing are not easy to deform, the UV fission ink has good stereoscopic impression and clear lines, and the wrinkle structures or pattern edges are not easy to discolor and fall off.

The invention relates to blended modified asphalt and a preparation method thereof, and belongs to the technical field of asphalt material compositions. The blended modified asphalt is prepared from 90 # heavy traffic road petroleum asphalt, 70 # road petroleum asphalt, natural rock asphalt, an emulsifier op-10, an HDI-trihydroxymethyl hexyl lactone cross-linked polymer, phenylpropyl dimethyl siloxy silicate ester, vinyl-terminated polydimethylsiloxane, thermoplastic styrene-butadiene rubber, nanoscale calcium carbonate, organobentonite and diatomite according to a specific proportion. Polyethylene wax, an anti-rut agent, an antioxidant and the like. Wherein the natural rock asphalt is pre-modified by the HDI-trihydroxymethyl hexyl lactone cross-linked polymer, the 70 # road petroleum asphalt is pre-modified by the phenylpropyl dimethyl siloxy silicate ester, and the thermoplastic styrene-butadiene rubber is pre-modified by the vinyl terminated polydimethylsiloxane. The modified components are better in compatibility and good in blending homogeneity, the components are not easy to reject, and the blended modified asphalt is excellent in use performance.

The invention relates to the technical field of bottom protection plates, and provides an engine bottom protection plate and a preparation method thereof. The engine bottom protection plate is prepared from the following raw materials in parts by weight: 40 to 50 parts of polypropylene, 15 to 20 parts of glass fiber, 5 to 10 parts of silicon carbide modified carbon fiber, 5 to 9 parts of nano silicon dioxide, 2 to 3 parts of compatilizer, 0.5 to 1 part of antioxidant, 0.3 to 0.5 part of calcium stearate and 0.4 to 0.6 part of polyethylene wax. The engine bottom guard plate provided by the invention is high in hardness, also has certain acid and alkali resistance, keeps good mechanical properties, and meets the development of the modern automobile industry and the change of consumer demands.

The invention belongs to the technical field of waterproof and drainage boards, and provides a waterproof and drainage board with high compressive strength and tensile strength and a preparation method and application thereof.The waterproof and drainage board is formed by compounding an upper layer, a middle layer and a lower layer, and the upper layer and the lower layer are each prepared from 30-40 parts of high-density polyethylene, 10-20 parts of chlorinated polypropylene, 10-15 parts of metallocene polyethylene and 1-3 parts of carbon nanotubes; 2-5 parts of nano calcium carbonate, 1-5 parts of polyethylene wax, 1-3 parts of an antioxidant and 1-3 parts of an anti-ultraviolet agent; the middle layer is prepared from the following raw materials: 35 to 55 parts of linear low-density polyethylene, 15 to 30 parts of metallocene polyethylene, 10 to 15 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of POE (Polyolefin Elastomer), 5 to 10 parts of aramid chopped fiber, 1 to 3 parts of antioxidant and 1 to 3 parts of ultraviolet screening agent; the nano calcium carbonate is subjected to modification treatment. The waterproof and drainage board has relatively high compressive strength and tensile strength, and has a good application prospect.

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 method and a system for repairing freeze-thaw damage of power plant concrete. According to the invention, the combination of Portland cement and nano-silica in the repairing material enhances the compactness of concrete and reduces the number of capillary pores, and the silane coupling agent significantly improves the bonding strength between the repairing material and original concrete and ensures the long-term stability of a repairing layer; the alkali activator sodium hydroxide accelerates the hydration reaction of the cement, and improves the early strength and durability of the repair material; the antibacterial agent benzalkonium bromide effectively inhibits the growth of bacteria, prevents microorganisms from eroding the concrete, and prolongs the service life of the repair structure; the defoaming agent alkyl sulfate reduces bubbles in the repairing material and improves the compactness and impermeability of the concrete; tiny air bubbles are introduced into the air entraining agent polyethylene wax, so that the freezing resistance and the crack resistance of the concrete are enhanced, and the high efficiency and the reliability of a repair project in a complex environment are also ensured.

The invention discloses a high-barrier polyethylene film and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a high-barrier polyethylene film. The high-density polyethylene composite material is prepared from the following raw materials in parts by weight: 25 to 40 parts of high-density polyethylene, 15 to 30 parts of linear low-density polyethylene, 8 to 16 parts of ethylene-vinyl alcohol copolymer, 3 to 8 parts of nano montmorillonite, 5 to 10 parts of modified layered double hydroxide, 2 to 6 parts of nano silicon dioxide aerogel, 0.2 to 0.6 part of antioxidant 1076, 0.1 to 0.4 part of light stabilizer UV-770, 3 to 7 parts of tributyl citrate and 1 to 3 parts of octadecanamide. 1-3 parts of polyethylene wax, 0.6-1.2 parts of a silane coupling agent KH560 and 7-12 parts of a functional additive. According to the high-barrier polyethylene film disclosed by the invention, by using the modified layered double hydroxide and the functional additive, the barrier property and the antibacterial property are enhanced, the mechanical property is improved, the comprehensive performance is excellent, and the application prospect is good.

The present invention relates to an insulating rubber sheath cable repair strip and a preparation method and application thereof. The insulating rubber sheath cable repair strip comprises a reinforcing tensile element and a re-vulcanizable rubber strip, wherein the reinforcing tensile element is arranged at the center of the re-vulcanizable rubber strip; the re-vulcanizable rubber strip comprises: 86-90 parts of chlorinated polyethylene, 10-14 parts of ethylene propylene rubber, 10-14 parts of magnesium oxide, 7-9 parts of flame retardant, 0.7-0.9 parts of antioxidant, 10-14 parts of carbon black, 13-17 parts of white carbon black, 18-22 parts of clay, 10-14 parts of talc, 13-17 parts of plasticizer, 10-14 parts of diisooctyl adipate, 0.7-0.9 parts of paraffin wax, 0.9-1.1 parts of polyethylene wax, 2.3-2.7 parts of vulcanizing agent, and 1.8-2.2 parts of vulcanizing agent. The present invention solves the problems of facilitating the repair of cable sheaths and facilitating production, more effectively saving costs and reducing safety.

The invention discloses a chromium-free fingerprint-resistant coating agent for a galvanized steel sheet and a preparation method of the chromium-free fingerprint-resistant coating agent. The chromium-free fingerprint-resistant coating agent is prepared from the following elements in percentage by mass: 1%-5% of sodium molybdate or / and sodium tungstate, 0.5%-2% of a phytic acid-chitosan compound, 0.3%-1.0% of a chelating titanate coupling agent, 2%-5% of fluorosilane modified nano SiO2, 30%-55% of waterborne hyperbranched polyurethane resin, 0.5%-2% of oxidized polyethlene wax and the balance of deionized water. The chromium-free fingerprint-resistant coating agent disclosed by the invention has excellent fingerprint resistance, high adhesive force and environmental protection property, is free of white rust in neutral salt mist for 150 hours and red rust in neutral salt mist for 360 hours, the white rust area is less than 5%, the industrial requirements of galvanized steel sheet surface treatment are met, and the problem of environmental risk in the prior art is avoided by adopting the combination of bio-based corrosion inhibitors.

The invention relates to the technical field of cables, and provides a high-temperature-resistant flame-retardant cable and a preparation method thereof. The high-temperature-resistant flame-retardant cable comprises a conductor and a flame-retardant outer sheath, the flame-retardant outer sheath is prepared from the following raw materials in parts by weight: 40 to 50 parts of linear low-density polyethylene, 35 to 45 parts of ethylene-vinyl acetate copolymer, 10 to 15 parts of ethylene propylene diene monomer, 15 to 18 parts of modified aluminum hydroxide, 10 to 14 parts of modified magnesium hydroxide, 5 to 8 parts of polyethylene grafted maleic anhydride, 5 to 8 parts of microencapsulated red phosphorus, 2 to 3 parts of silane coupling agent and 0.8 to 1 part of antioxidant. The composite material is prepared from the following components in parts by weight: 0.5-1 part of a light stabilizer, 0.5-1 part of calcium stearate, 0.8-1 part of polyethylene wax and 0.5-0.9 part of carbon nanotubes. According to the cable prepared in the invention, the performance stability of an existing high-temperature-resistant material in a high-temperature environment is improved, and the problems of softening, melting and the like of the cable are avoided.

The invention belongs to the technical field of polymer composite materials, and relates to an ionic liquid modified magnesium hydroxide flame-retardant master batch for rotational moulding and a preparation method thereof, the flame-retardant master batch comprises the following components by mass percentage: 10.0%-40.0% of polyethylene, 3.0%-10.0% of polyethylene wax, 15.0%-60.0% of functional magnesium hydroxide, 0-50.0% of magnesium hydroxide, 5.0%-10.0% of a flexibilizer, and 3.0%-10.0% of an antioxidant. The preparation method has the advantages that groups with specific functions are introduced to N at two different positions of an imidazole ring, organic and inorganic compounding is realized through the groups, the problem of thermoplasticity of Mg (OH) 2 is solved, and the prepared composite material has the characteristic of low percolation threshold value; the imidazole structure in the ionic liquid has high thermal stability and charring ability, and meanwhile, the silica structure is easy to migrate to the surface of the material during combustion to generate a barrier layer, so that the thermal insulation and flame retardant effects are achieved.