31results about How to "Moderate elongation" patented technology

The invention discloses a wet spinning method for preparing cellulose acetate fiber. The wet spinning method comprises the following steps: grinding solid cellulose diacetate, of which the degree of acetylation is 2.1 to 2.8 and the water content is 1 to 7 percent, into powder; adding the cellulose diacetate powder and an organic solvent into a dissolving tank, and carrying out sufficient stirring for mixing, and raising the temperature for dissolution, wherein the mass ratio of the cellulose diacetate powder to the organic solvent ranges from 1:3 to 1:7, the dissolving time is 0.5 to 8 hours, and the dissolving temperature is 35 to 120 DEG C; filtering and deforming a dope obtained after dissolution to obtain a spinning dope; after the spinning dope passes through a metering pump and a filter, spraying the filtered spinning dope from spinneret orifices to enter a coagulation bath to obtain nascent fiber, wherein the concentration of the coagulation bath is 25 to 70%, and the temperature is 20 to 90 DEG C; preparing a finished acetate fiber product from the nascent fiber through drafting, washing, oiling and drying. The cellulose acetate fiber prepared according to the method disclosed by the invention has excellent indexes, good mechanical properties, and remarkably improved dry strength and wet strength; the preparation process is simple, feasible, and easy to control; the solvent cost is low.

The invention relates to a making method of a nine-striped car child seat safety woven belt. The method mainly comprises the following steps: warping warps on a special device in a specific tension environment, respectively putting warped beams on a special weaving machine, weaving, and carrying out a dyeing and finishing operation on a special dyeing and finishing device under a specific technological condition to obtain the nine-striped car child seat safety woven belt. Compared with car child seat safety woven belts made in the prior art, the nine-striped car child seat safety woven belt made through adopting the making method has the advantages of high strength, good abrasion resistance, moderate elongation rate, high light resistance, non-toxicity, good flame resistance, good edge self-lock thread running resistance and the like, so the nine-striped car child seat safety woven belt provides a high safety guarantee for babies and children in motor vehicles.

The invention discloses acidic corrosion resistant X60MS pipeline steel. The acidic corrosion resistant X60MS pipeline steel comprises the following components of, by weight percent, 0.05-0.07% of C,0.10-0.20% of Si, 0.90-1.10% of Mn, less than or equal to 0.010% of P, less than or equal to 0.002% of S, 0.020-0.030% of Nb, 0.010-0.020% of Ti, 0.020-0.040% of Al and 0.20-0.30% of Cr. The inventionfurther discloses a preparation method of the acidic corrosion resistant X60MS pipeline steel. According to the acidic corrosion resistant X60MS pipeline steel and the preparation method thereof, theweldability, the HIC resistance and the drop hammer tearing resistance of the X60MS pipeline steel are improved; the production efficiency of the X60MS pipeline steel is improved substantially; energy consumption and the production cost are lowered; the service life is prolonged; the transportation safety of petroligenic natural gas is improved; and the requirements of socioeconomic development are met advantageously.

The invention relates to a method for preparing five-stripe secure fabric tape for automobile children's seat. The method comprises following steps: first, warp is subjected to beam-warping under specific tension environment on a special device; then the well warped warp beams are installed on a special weaving machine for weaving; finally, dyeing and finishing are processed on a special dyeing and finishing machine with a specific technology to obtain products. Compared with the prior art, the secure fabric tape for automobile children's seats prepared by the method of the invention has high strength, good wear resistance, moderate elongation percentage, high light resistance, good flame resistance, edge self-locking line type thread off prevention and is nontoxic; better safety control is provided for babies and children who take the automobiles.

The invention provides a strong film and a preparation method and an application thereof, which belong to the technical field of coiled materials. The strong film of the invention includes, by mass, the following components: 20-80% of high molecular materials; 1-20% of POE; 0.5-75% of composite functional materials; and 0.5-6% of color masterbatch; the high molecular materials are PP and / or HDPE;and the composite functional materials are one or more of functional masterbatch which is synergistically modified by mica and glass fiber, carbon fiber materials and polyester fiber materials. The strong film adopts the composite functional materials and cooperates with other components to make the film have the advantages of high strength, excellent high temperature resistance, small shrinkage,moderate elongation rate, good heat aging performance, and the like.

Provided is a binder for an electrode mix containing a semi-interpenetrating polymer network (semi-IPN) of polyvinyl alcohol and polyurethane, wherein the polyurethane is mixed to crosslink with the polyvinyl alcohol to form semi-IPN, and a lithium secondary battery comprising the same. The binder has superior adhesion to the electrode, excellent electrolyte resistance and improved elongation percentage, and therefore it is possible to prevent exfoliation or separation of electrode active materials from current collectors which occurs during repeated charge / discharge cycles. As a result, the capacity or power out of secondary batteries can be maintained at a constant level.

A radical-polymerizable resin composition which comprises one or more metal-containing compounds (A) selected from among metal soaps (A1) and metal complexes (A2) having a beta-diketone skeleton, oneor more thiol compounds (B) selected from among secondary thiol compounds (B1) and tertiary thiol compounds (B2), a radical-polymerizable compound (C), and an elastomer (D), and which can be stably cured not only under dry conditions but also in water or seawater or on wet bases, that is, stably cured on dry surfaces, on surfaces immersed in water or seawater, or on wet surfaces; a prepreg sheet obtained by prepolymerizing the radical-polymerizable resin composition; a curable material for preventing concrete flaking which comprises the radical-polymerizable resin composition; a primer; a radical-polymerizable coating composition; and a material for restoring inorganic structures.

The invention relates to a method for preparing a ten-stripe secure fabric tape for an automobile children's seat. The method comprises following steps: first, warp is subjected to beam-warping under specific tension environment on a special device; then the well warped warp beams are installed on a special weaving machine for weaving; finally, dyeing and finishing are processed on a special dyeing and finishing machine with specific technology to obtain products. Compared with the prior art, the secure fabric tape for automobile children's seats prepared by the method of the invention has high strength, good wear resistance, moderate elongation percentage, high light resistance, good flame resistance, edge self-locking line type thread off prevention and is nontoxic; better safety control is provided for babies and children who take the automobiles.

The invention relates to a double-sided reinforced mica tape with films. The mica tape sequentially comprises a first organic film layer, a first adhesive layer, mica paper, a second adhesive layer and a second organic film layer from bottom to top. The double-sided reinforced mica tape with the films has the advantages that the double-sided reinforced mica tape is low in manufacturing cost, high in surface abrasion resistance, sufficient in strength and proper in elongation, and an insulating property of the mica paper cannot be destroyed even when the double-sided reinforced mica tape is burned; as tested by experiments, the tensile strength of the mica tape is higher than or equal to 30N, the breaking strength of the mica tape is higher than or equal to 100N, and the mica tape can be used for motors.

The invention discloses a wet spinning method for preparing cellulose acetate fiber. The wet spinning method comprises the following steps: grinding solid cellulose diacetate, of which the degree of acetylation is 2.1 to 2.8 and the water content is 1 to 7 percent, into powder; adding the cellulose diacetate powder and an organic solvent into a dissolving tank, and carrying out sufficient stirring for mixing, and raising the temperature for dissolution, wherein the mass ratio of the cellulose diacetate powder to the organic solvent ranges from 1:3 to 1:7, the dissolving time is 0.5 to 8 hours, and the dissolving temperature is 35 to 120 DEG C; filtering and deforming a dope obtained after dissolution to obtain a spinning dope; after the spinning dope passes through a metering pump and a filter, spraying the filtered spinning dope from spinneret orifices to enter a coagulation bath to obtain nascent fiber, wherein the concentration of the coagulation bath is 25 to 70%, and the temperature is 20 to 90 DEG C; preparing a finished acetate fiber product from the nascent fiber through drafting, washing, oiling and drying. The cellulose acetate fiber prepared according to the method disclosed by the invention has excellent indexes, good mechanical properties, and remarkably improved dry strength and wet strength; the preparation process is simple, feasible, and easy to control; the solvent cost is low.

The invention discloses a method for preparing electrospun high-performance polyphenylene derivative nanofibers, comprising the following steps: (1) dissolving o-dicarboxybenzene-terminated substituted benzene oligomers and aromatic tetraamine monomers in a solvent, Prepare the precursor solution; (2) add a filament forming agent to the above precursor solution to form a spinning mixed solution, and form a blended nanofiber precursor by electrospinning; (3) process the above blended nanofiber precursor After drying, heat treatment is performed to obtain polyphenylene derivative nanofibers. The method overcomes the disadvantages that the molecular weight of the polyphenylene derivative obtained by the general synthesis method is relatively low, and it is difficult to prepare high-performance polyphenylene derivative nanofibers. The polyphenylene derivative nanofiber obtained by the method has good mechanical properties such as high toughness, high strength, high modulus, moderate elongation and the like.

The invention discloses an electrospun nylon 66 / PVA / boric acid nanofiber, which comprises nylon 66 salt, PVA and boric acid, wherein the mass ratio of nylon 66 salt to PVA is 4:(1-6). This method solves the problem of preparing nylon 66 / PVA / boric acid composite nanofibers by electrospinning in a non-toxic, cheap, and environmentally friendly water solvent, and overcomes the large-scale electrospinning of nylon from formic acid solution due to the strong taste of formic acid Disadvantages of nanofibers. The nylon 66 / PVA / boric acid composite nanofiber prepared by the method provided by the invention has better tensile strength, toughness and modulus, and has moderate elongation. On the other hand, due to the small fiber diameter of nylon nanofibers, toughness and high strength, the nylon 66 / PVA / boric acid nanofiber nonwoven fabric prepared by the present invention also has better tensile strength and elongation at break High rate, good filterability.

Radical polymerizable resin composition, prepreg sheet obtained by prepolymerizing the same, curable material for preventing concrete spalling containing radical polymerizable resin composition, primer, radical polymerizable coating composition , and an inorganic structure restoration material, wherein the radically polymerizable resin composition contains: at least one metal-containing compound ( A); one or more thiol compounds (B) selected from secondary thiol compounds (B1) and tertiary thiol compounds (B2); radically polymerizable compound (C); and elastomer (D), above The radically polymerizable resin composition can be used even under dry conditions, in water and seawater, and on a wet substrate, that is, on a dry surface, a surface immersed in water or seawater, and a wet surface. Solidifies stably.

Using specific technique of rapid hardening slice produces alloy based on neodymium (or praseodymium) iron. Then, through reaction of gas-solid phase, crumbling procedure produces RxFe100-x-y-zMyIz magnetic powder. The magnetic powder is single crystal grain in sheet form with average grain size as 1-3 micro. The magnetic powder produced by the disclosed technique possesses anisotropy of magnetocrystalline under action of external magnetic field as well as rolling anisotropy and stress anisotropy. Based on three kinds of anisotropy, the invention discloses method for preparing high performance flexible rubber magnet with rolling anisotropy. The prepared flexible magnet possesses excellent magnetism, flat surface, good cohesiveness, and feasible mechanical properties including tensile strength, extensibility, and rigidity as well as characteristics of temperature resisting, moisture resistance, oil proof and anticorrosion.

The invention discloses a high-strength cold-rolled hot-galvanized precipitation reinforced steel plate and a manufacturing method thereof. The steel plate comprises the following components: 0.09 to 0.12 weight percent of C, less than or equal to 0.05 weight percent of Si, 0.8 to 1.8 weight percent of Mn, less than or equal to 0.02 weight percent of P, less than or equal to 0.01 weight percent of S, less than or equal to 0.008 weight percent of N, 0.02 to 0.06 weight percent of Al, 0.05 to 0.08 weight percent of Nb and Ti and the balance of Fe and inevitable impurities. The microstructure of the steel plate is ferrite and second phase particles, wherein the diameter of the second phase particles is about less than 6 mu m, the yield strength is 500 to 600MPa, the tensile strength is 570 to 710MPa, and the total coefficient of elongation is over 14 percent (80 gauge length and transverse stretching). The hot-galvanized steel plate has high welding performance and surface quality and can be widely used in automotive structural membranes.

The invention relates to a steel with the yield ratio of 0.9 or more used for an ultra-fine grain slideway and a production method thereof. The steel mainly comprises the following components in percentage by weight: 0.03-0.07% of C, less than or equal to 0.03% of Si, 0.50-0.80% of Mn, 0.02-0.07% of Al, less than or equal to 0.03% of P, less than or equal to 0.015% of S, 0.02-0.07% of Nb, less than or equal to 0.06% of Mo and the balance of Fe and impurities. The production steps comprise hot metal desulphurization, converter smelting, ladle argon blowing, continuous casting, casting blank heating, hot rolling, reeling, ordinary scouring, cold rolling, continuous annealing, and leveling for stand-by. The defects that the existing same-level high-strength steel is low in yield and the specification and the welding of hot rolling materials are difficult to meet are overcome. The yield ratio of the steel disclosed by the invention achieves 0.9 or more, the grain size of the steel achieves 13 or more, and a steel plate has high yield ratio, appropriate elongation and good spot welding property.

The object of the present invention is to provide a polyurethane resin having excellent compatibility and workability and excellent cooling and heating cycle characteristics using a polybutadiene polyol having a hydroxyl value of 60 mgKOH / g or less. The present invention relates to a polyurethane resin composition containing (A) a polyisocyanate compound, (B) a polyol compound, (C) an inorganic filler, and (D) a plasticizer, the (B) polyol compound comprising (b1 ) a polybutadiene polyol having a hydroxyl value of 60 mgKOH / g or less, containing (C) 50 to 85 mass % of an inorganic filler, and (D) 1 to 30 mass % of a plasticizer relative to 100 mass % of the polyurethane resin composition. quality%.

The invention relates to an X70M hot-rolled steel plate for a thin-gauge gas transmission straight seam welded pipe and a manufacturing method thereof. The chemical composition of the steel plate is calculated by weight percentage: C 0.05%-0.09%, Si 0.10%-0.35%, Mn 1.50 %~1.80%, P≤0.020%, S≤0.015%, Nb 0.04%~0.09%, Ti 0.008%~0.0250%, Al 0.015%~0.045%, Cr≤0.4%, V 0.020%~0.06%, N 0.0041 % to 0.006%, and the balance is Fe and unavoidable impurities; the steel plate produced by the invention is suitable for manufacturing X70M straight seam welded pipes for natural gas pipelines with a diameter of 10 to 18 mm and a wall thickness of 10 mm.

The invention relates to a silicon resin composition for nuclear motor mica tape. The silicon resin is mainly prepared by the following raw materials which comprise, by mass percent, 10-50% of methyl MQ silicon resin, 9-25% of phenyl MQ silicon resin, 5-30% of hydroxyl silicone rubber, 10-40% of phenyl silicone rubber, 40% of organic solvents and 0.005-0.02% of basic catalysts. The nuclear motor mica tape using the silicon resin composition is low in product production cost, high in surface abrasive resistance, good in flame retardant performance, self-extinguishing resistance and insulating performance and resistant to high temperature and radiation, and has sufficient strength and proper ductility.