40results about How to "Uniform tensile strength" patented technology

The invention provides a thermosetting resin composition comprising a bifunctional dihydrobenzoxazine compound and an epoxy compound, and provides a thermosetting resin molding obtained by thermally curing the thermosetting resin composition. The molding has excellent electric properties of low dielectric constant and low dielectric loss tangent. The resin composition comprises an epoxy compound and a bifunctional dihydrobenzoxazine compound of the following general formula (1), wherein the equivalent ratio of the epoxy compound to the bifunctional dihydrobenzoxazine compound is 1/(0.1 to 20):

wherein R represents a linear alkylene group having at least 2 carbon atoms, or a branched alkylene group derived from it by substituting the hydrogen atom therein with an alkyl group, and the hydrogen atom of the benzene ring may be substituted with an alkyl group or an alkoxy group.

The invention discloses a coating composite for a lithium ion secondary battery membrane and a method for manufacturing the membrane. The coating composite comprises heat resistant resins and inorganic non-conducting insulation particles, molecular chains of the heat resistant resins comprise oleophylic structural units, hydrophilic structural units and functional group structural units, and a thermal decomposition temperature is larger than 250 DEG C. The inorganic non-conducting insulation particles have the advantages of being high temperature resistant, low in density, rigidity and water absorption and the like; composite micro porous membranes prepared through the coating composite has the advantages of being low in hole closing temperature, high in membrane breaking temperature, low in thermal shrinkage rate, high in combining force between a heat resistant coating and a substrate, good in wettability of the heat resistant coating surface and the like simultaneously; and the membrane used for manufacturing a lithium ion secondary battery has good comprehensive properties and reliable safety performances.

A chain for driving and engagement of at least one sprocket including plurality of interlaced link plates and a plurality of guide plates. The link plates are pivotably connected by connecting pins. The plurality of guide plates are disposed along the link plates and guide the chain on the sprocket in a width direction. At least one of the guide plates has a flat portion and a crotch portion and is in line with a marked position on the sprocket.

A medical device delivery catheter includes an elongate tubular body including proximal, intermediate, and distal longitudinal segments. The proximal segment extends between a proximal end of the body and a first transition between the proximal segment and the intermediate segment, has a first outer diameter, and includes at least one flexibility increasing cut through a wall of the body. The intermediate segment extends between the first transition and a second transition between the intermediate segment and the distal segment, has a second outer diameter that is less than the first outer diameter, and defines a medical device support region. The distal segment has an initial outer diameter that is greater than the second outer diameter and terminates in a distally tapered region. The body is free of joints and has a uniform tensile strength across the proximal, intermediate, and distal segments and the transitions.

The invention relates to a membrane material for a transfusion soft bag and application of the membrane material. The membrane material is obtained by at least co-extruding an outer layer material, a middle layer material and an inner layer material, wherein the outer layer material comprises PP (Polypropylene), PE (Polyethylene) and SEBS (Styrene-Ethylene-Butadiene-Styrene segmented copolymer), wherein the PP accounts for 60wt%-99wt%, the PE accounts for 0.5wt%-30wt% and the SEBS accounts for 0.2wt%-20wt%; the middle layer material comprises PP, PE and SEBS, wherein the PP accounts for 20wt%-90wt%, the PE accounts for 0.5wt%-20wt% and the SEBS accounts for 0.2wt%-65wt%; and the inner layer material comprises PP, SEBS, TPO (Thermoplastic Polyolefin) and polyolefin wax, wherein the PP accounts for 37wt%-99wt%, the SEBS accounts for 0.1wt%-30wt%, the TPO accounts for 0.2wt%-9wt% and the polyolefin wax accounts for 0.1wt%-7wt%. The membrane material for the transfusion soft bag does not contain PVC (Polyvinyl Chloride) or DEHP (Diethylhexyl Phthalate) and a heat transfer film can be used for printing words or coating colors and printing; the membrane material for the transfusion soft bag has good low-temperature resistance falling performance and separation performance; and a false welding connection part can be formed in the inner layer to prepare the multi-chamber transfusion soft bag.

The invention discloses a low-specific-resistance and high-plasticity silicon-manganese-nickel alloy wire and a preparing method and application thereof, and belongs to the technical field of nonferrous metal alloy materials. The alloy wire comprises chemical components including, by weight percent, 1.9%-2.5% of Si, 0.2%-0.7% of Mn, 0.2%-0.7% of Ni, smaller than or equal to 0.4% of Zn, smaller than or equal to 0.2% of Sn and the balance Cu. The preparing process includes the first step of raw material preparing and burdening, the second step of vacuum smelting, the third step of cast ingot forging, the fourth step of hot rolling, the fifth step of cold machining and middle process vacuum annealing and the sixth step of stretching treatment and finished product annealing. The specific resistance of the manganese-nickel alloy wire is 0.15-0.15 micron omega.m, the tensile strength is larger than or equal to 260 N/mm<2>, and the ductility is larger than or equal to 25%. The low-specific-resistance and high-plasticity silicon-manganese-nickel alloy wire and the preparing method and application thereof can be used for electric light source fuses or electron components or heating wires.

Disclosed is an electrolytic copper foil obtained by heat treating a copper foil manufactured through electrolysis, the electrolytic copper foil having specific resistivity of 1.68 to 1.72 μΩ·cm and a grain mean diameter of a crystallite of 1.0 to 1.5 μm.

A steel sheet according to an aspect of the present invention includes a predetermined chemical composition; in which a metallographic structure in a ¼ t portion contains residual austenite of 4 volume % to 70 volume %; [Mn]_γ/[Mn]_ave>1.5 is satisfied in the ¼ t portion; f_γs/f_γ≤0.30 and [C]×[Mn]≥0.15 are satisfied in the ¼ t portion.

The invention belongs to the technical field of welding, and relates to weathering resistant steel welding line alloy and an SAW welding method of weathering resistant steel to obtain weathering resistant steel welding products capable of meeting the using requirement under the severe condition. The weathering resistant steel welding line alloy contains multiple abrasion resisting alloy elements, and therefore the using requirement under the severe condition can be met.

The invention discloses a coiled material steel bar grouting connector, and belongs to the field of a preassembled building structure in the civil engineering. The coiled material steel bar grouting connector comprises a coiled material, expansive mortar and a support frame, wherein the coiled material is a soft coiled building material; the support frame is provided with transverse and/or longitudinal stress bars; the expansive mortar is connected with steel bars; the coiled material is wound around the outer surface of the support frame; and the expansive mortar is injected into the coiled material. The coiled material steel bar grouting connector can be used for connecting steel bars between assembled components. The coiled material steel bar grouting connector can be arranged at a connecting joint part of the assembled components in the engineering, can bear the axial tension generated by building components under the load effect, and can enable the building material at the joint part to be subjected to coordinate deformation. The coiled material steel bar grouting connector has the advantages that the structural form is simple and free; the mechanical property is reliable; the installation is convenient and fast; the industrialization can be realized; and the coiled material steel bar grouting connector has wide engineering application prospects.

The invention provides a manufacturing method of an aluminum alloy packaging bottle material. The alloy comprises the following components in percentage by weight: 0.75-0.80% of Fe, 0.60-0.75% of Si, less than 0.9% of Cu, 0.04-0.11% of Mn, less than 0.06% of Mg, less than 0.04% of Zn, 0.02-0.04% of Ti and the balance of Al, totaling 100%. The manufacturing method comprises the following steps: proportionally melting alloy elements, evenly mixing, and casting into a blank ingot; carrying out face milling on the aluminum alloy blank ingot, wherein the single-side face milling quantity is greater than or equal to 12mm, the thickness difference between the two sides is less than or equal to 2.6mm, and the face milling roughness is 0.06-0.15mm; heating the aluminum alloy blank ingot subjected to face milling to 500-560 DEG C within 15-20 hours, keeping the temperature for 6-10 hours, and discharging; rolling the heated aluminum alloy blank ingot in a rolling mill, wherein the thickness of the aluminum alloy blank ingot is distributed by 17-22 passes, and the temperature after hot rolling is kept at 280-320 DEG C; carrying out cold rough rolling by 5-6 times until the thickness is 35-45m, and carrying out interannealing in an annealing furnace; carrying out cold finish rolling on the annealed coil until the thickness of the finished product is 0.17-0.21mm, and selecting the extensibility according to the size and shape to carry out stretch bending and straightening; and cleaning and trimming the straight coil with a cleaning machine, and finally, cutting with cutting equipment according to the technological requirements.