31results about How to "Moderate elongation" patented technology

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.

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.

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.