133results about How to "High yield stress" patented technology

A bag for use in the intravascular treatment of saccular aneurysms and a method of forming the bag are disclosed. The bag is formed from a plurality of flexible, resilient filamentary members braided into a tubular sleeve and biased into a first shape having an expanded first diameter sized to substantially fill the aneurysm. The bag is resiliently deformable into a second shape having a diameter smaller than the first and sized to slidingly interfit within the lumen of a catheter. An opening is provided in the bag to receive a clotting medium, such as a platinum wire, on which blood clots can be induced to form by mechanical or electrolytic means. A closure is provided by biasing the filamentary members to form a constriction around the opening. In use the, bag is inserted into a saccular aneurysm via the catheter and expands to its first diameter upon release therefrom. Interstices between the interbraided filamentary members provide pores allowing blood from the aneurysm to enter the bag when the bag is positioned within the aneurysm. The clotting medium wire is packed into the bag, blood clots on the wire and occludes the aneurysm, sealing it off from the blood stream and preventing rupture. The wire is released from the catheter and is contained within the bag in the aneurysm.

A bag for use in the intravascular treatment of saccular aneurysms and a method of forming the bag are disclosed. The bag is formed from a plurality of flexible, resilient filamentary members braided into a tubular sleeve and biased into a first shape having an expanded first diameter sized to substantially fill the aneurysm. The bag is resiliently deformable into a second shape having a diameter smaller than the first and sized to slidingly interfit within the lumen of a catheter. An opening is provided in the bag to receive a clotting medium, such as a platinum wire, on which blood clots can be induced to form by mechanical or electrolytic means. The opening is urged to a closed position by resiliently biasing the filamentary members. In use the, bag is inserted into a saccular aneurysm via the catheter and expands to its first diameter upon release therefrom. Interstices between the interbraided filamentary members provide pores allowing blood from the aneurysm to enter the bag when the bag is positioned within the aneurysm. The clotting medium wire is packed into the bag, blood clots on the wire and occludes the aneurysm, sealing it off from the blood stream and preventing rupture. The wire is released from the catheter and is contained within the bag in the aneurysm.

A method of manufacturing a cementitious composite including: (1) mixing an extrudable cementitious composition by first forming a fibrous mixture comprising fibers, water and a rheology modifying agent and then adding hydraulic cement; (2) extruding the extrudable cementitious composition into a green extrudate, wherein the green extrudate is characterized by being form-stable and retaining substantially a predefined cross-sectional shape; (3) removing a portion of the water by evaporation to reduce density and increase porosity; and (4) heating the green extrudate at a temperature from greater than 65° C. to less than 99° C. is disclosed. Such a process yields a cementitious composite that is suitable for use as a wood substitute. Particularly, by using higher curing temperatures for preparing the cementitious building products, the building products have a lower bulk density and a higher flexural strength as compared to conventional products. The wood-like building products can be sawed, nailed and screwed like ordinary wood.

This high-strength steel sheet includes: in terms of percent by mass, 0.03 to 0.10% of C; 0.01 to 1.5% of Si; 1.0 to 2.5% of Mn; 0.1% or less of P; 0.02% or less of S; 0.01 to 1.2% of Al; 0.06 to 0.15% of Ti; and 0.01% or less of N; and contains as the balance, iron and inevitable impurities, wherein a tensile strength is in a range of 590 MPa or more, and a ratio between the tensile strength and a yield strength is in a range of 0.80 or more, a microstructure includes bainite at an area ratio of 40% or more and the balance being either one or both of ferrite and martensite, a density of Ti(C,N) precipitates having sizes of 10 nm or smaller is in a range of 10¹⁰ precipitates/mm³ or more, and a ratio (Hvs/Hvc) of a hardness (Hvs) at a depth of 10 μm from a surface to a hardness (Hvc) at a center of a sheet thickness is in a range of 0.85 or more.

A magnetorheological fluid formulation exhibiting consistently high yield stress during use. The MR fluid comprises martensitic or ferritic stainless steel particles prepared by a controlled water or inert gas atomization process. The stainless steel particles are resistant to corrosion and oxidation, are generally smooth and spherical, and maintain their shape and size distribution throughout their use under an applied magnetic field.

The invention relates to a beet pectin and an extraction method thereof, and concretely relates to a beet pectin with good emulsibility, good emulsification stability and excellent yield stress, and an extraction method thereof. An acid extraction-cooling-pH adjustment-alcohol precipitation technology adopted by the extraction method further improves the emulsion turbidity, the purity and the yield stress of the obtained beet pectin. The beet pectin is especially suitable being used in stabilizers and emulsifiers in the food industry in order to improve the economic benefit of the sugar industry, and provides a good approach for further comprehensive utilization of wastes.

This invention relates to an external structuring agent for application in liquid detergent and personal care products. It has been found that cellulose based particles, which comprise cell wall material and their networks of cellulose based fibers and nanofibrils can advantageously be used to structure liquid detergent and personal care products, providing certain benefits that are much sought after in the design of such products. It is assumed that the organization of the cellulose fibrils, as it exists in the parenchymal cell walls, is at least partly retained in the cellulose based particles of the invention, even though part of the pectin and hemicellulose is removed there from. The process of making the structuring agent involves processing under relatively mild conditions, of a biological material that is currently considered a by-product.

A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 5 to 95%, and bainite: 5 to 95%. When a region that is surrounded by a grain boundary having a misorientation of 15° or more and has a circle-equivalent diameter of 0.3 μm or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. Hard crystal grains A in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1×10¹⁶ to 1×10¹⁹ pieces/cm³ and soft crystal grains B in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1×10¹⁵ pieces/cm³ or less are contained, and the volume % of the hard crystal grains A/(the volume % of the hard crystal grains A +the volume % of the soft crystal grains B) is 0.1 to 0.9.

A high-strength, high-permeability steel sheet for picture tube band comprises, in mass percent, C: 0.003-0.010%, Si: 0.5-1.0%, Mn: 1.0-2.0%, P: 0.04-0.15%, S: not more than 0.02%, Al: not more than 0.030%, N: not more than 0.004% and the balance of Fe and unavoidable impurities, has a chemical composition satisfying C×Mn×P≧2.5×10⁻⁴, and has a ferrite crystal grain diameter of 10-100 μm and a yield stress of 300 N/mm² or higher, and preferably has a specific permeability μ0.35 in a DC magnetic field of 0.35 Oe of 400 or higher. The steel sheet can be produced by regulating the hot-rolling coiling temperature to 600-700° C. and selecting an appropriate combination of the cold rolling reduction ratio and a final annealing temperature in the range of 750-900° C.

The invention relates a speed reducer lubricating grease composition and a preparation method thereof. The composition comprises 69 to 80 percent of mineral base oil, 12 to 23 percent of ester base oil, 3.2 to 6 percent of thickening agent, 0.6 to 2 percent of dinonyl sulfonate or zinc naphthenate, and 1 to 2.8 percent of solid wear-resistance additive. The preparation method comprises: adding the mineral base oil into a reaction kettle, adding fatty acid, mixing, raising temperature to 80 to 85 DEG C, adding an aqueous solution of lithium hydroxide, heating to 90 to 100 DEG C, and performingsaponification for 1 to 2 hours; raising temperature to 210 DEG C, adding the mineral base oil into the reaction kettle, and quenching, wherein the quenching temperature is kept between 140 to 190 DEG C, and the quenching oil accounts for 14 to 43 percent of the total amount of the base oil; adding the ester base oil, and cooling; when the temperature is below 100 DEG C, adding the dinonyl sulfonate or zinc naphthenate, cooling to a temperature below 80 DEG C, and adding the solid wear-resistance additive; and cooling to a temperature below 60 DEG C, rolling oil by a three-roll machine for three times and filling to obtain finished speed reducer lubricating grease composition. In the invention, the lubricating grease is prepared by one-step direct reaction, the process and equipment are simple and energy-saving, and the quality of the product produced by the process is stable.

The present invention provides a method for the fabrication of a steel sheet with a completely martensitic structure which has an average lath size of less than 1 micrometer and an average elongation factor of the laths is between 2 and 5. The elongation factor of a lath is defined as a maximum dimension divided by and a minimum dimension 1_max. The steel sheet has a yield stress greater than 1300 MPa and a mechanical strength greater than (3220(C)+958) megapascals. A composition of a semi-finished steel product includes, expressed in percent by weight, is, 0.15%≦C≦0.40%, 1.5%≦Mn≦3%, 0.005%≦Si≦2%, 0.005%≦Al≦0.1%, 1.8%≦Cr≦4%, 0%≦Mo≦2%, whereby: 2.7%≦0.5 (Mn)+(Cr)+3(Mo)≦5.7%, S≦0.05%, P≦0.1%, optionally: 0%≦Nb≦0.050%, 0.01%≦Ti≦0.1%, 0.0005%≦B≦0.005%, 0.0005%≦Ca≦0.005%. The semi-finished product is reheated to a temperature T₁ in the range between 1050° C. and 1250° C., then subjected to a roughing rolling at a temperature T₂ in the range between 1000 and 880° C., with a cumulative rate of reduction ε_a greater than 30%, to obtain a sheet with a completely recrystallized austenitic structure with an average grain size less than 40 micrometers and preferably less than 5 micrometers. The sheet is then partially cooled to prevent a transformation of the austenite at a rate V_R1 greater than 2° C./s to a temperature T₃ between 600° C. and 400° C. in the metastable austenitic range, and subjected to a finishing hot rolling at the temperature T₃ of the partially cooled sheet, with a cumulative rate of reduction ε_b greater than 30% to obtain a sheet that is then cooled at a rate V_R2 which is greater than the critical martensitic quenching rate.

Provided is a hot press member that is provided with all of the following properties: high strength, with tensile strength TS being 1,500 MPa or higher; high ductility, with uniform elongation uEL being 6.0% or higher; and excellent heat treatment curability, with yield stress YS increasing 150 MPa or more upon execution of a heat treatment (baking finish treatment). This hot press member is characterized by having a structure containing a prescribed component composition (specifically, a low C content of at least 0.090% and less than 0.30%, and a high Mn content of at least 3.5% and less than11.0%), a martensitic phase comprising 70.0 vol% or more, and a retained austenitic phase comprising 3.0-30.0 vol%, inclusive, and in that the dislocation density thereof is 1.0x10<16> m<2> or higher.

The invention relates to a bar-shaped perovskite deposited compound giant electrorheological fluid and preparation method thereof, including a continuous phase using a liquid insulating medium and a disperse phase dispersed therein. The invention is characterized in that the disperse phase is nanometer bar-shaped perovskite deposited compound particles, and the mass concentration of the disperse phase is 10% to 75%. The preparation method is as follows: the bar-shaped perovskite deposited compound particles are firstly synthesized by coprecipitation method, and then mixed with the liquid insulating medium with low specific inductive capacity uniformly so that the perovskite compound giant electrorheological fluid is prepared. Compared with the existing technology, the perovskite compound giant electrorheological fluid provided by the invention has simple preparation method, easy operation, low material cost and short preparation period, and the obtained giant electrorheological fluid has the advantages of low initial viscosity, great stress yield, low leakage current density, and the like.

The invention relates to kitchen oil dirt cleaner and a preparation method thereof; the kitchen oil dirt cleaner is prepared from, by weight, 0.1-1.0% of polyacrylate copolymer, 1.0-15.0% of a surfactant, 1.0-20.0% of an oil dirt softener, 0.1-15.0% of an oil dirt hydrolyzing agent, 0.1-5.0% of a bactericide, 0.1-2.0% of an aid, and the balance of deionized water. The kitchen oil dirt cleaner can stay on a vertical surface for 1 min and longer, the cleaner has longer time to act with the dirt, and cleaning effect is improved; the kitchen oil dirt cleaner of the invention has large particle size for spraying, and is less atomized so that less irrigating smell and inhalation occurs; the kitchen oil dirt cleaner of the invention has a killing rate of >/=99.9% for Escherichia coli and Staphylococcus aureus, and can remove dirt and provide better bactericidal effect.

Polymer mixtures containing a first long-chain polymer and a second short-chain polymer. The structural parameters of the two polymers are coordinated in such a way that a polymeric material is obtained which is easier to process while being provided with improved mechanical properties and in part also improved thermal properties compared with the first polymer at suitable conditions for producing the polymer mixture as a result of networks being formed and heterocrystallization taking place.

The invention relates to a thixotropic ceramic paste material for stereolithography and a preparation method thereof. The thixotropic ceramic paste material mainly comprises the following components by mass percentage: 70-85wt% of ceramic powder; 3-15wt% of a thixotropic agent; and 10-25wt% of light cured resin. The preparation method mainly includes the steps of: conducting ball-milling and stirring on the ceramic powder, light cured resin, a dispersant and a photoinitiator, then adding the thixotropic agent for further ball-milling and stirring so as to obtain the paste. The ceramic paste has the characteristics of high solid content, significant thixotropy, yield pseudoplasticity and the like, greatly facilitates the forming process and improves the quality of components, and can be used in medical, aerospace, national defense and industrial fields.

The invention discloses a method for improving the fatigue performance of rare earth magnesium alloy by utilizing abnormal twin crystals. The method comprises the following steps: performing pre-deformation treatment on the rare earth magnesium alloy in the direction which forms an angle of 15 to 80 degrees with the normal direction of a base plane at 15 to 300 DEG C, wherein the true strain is 0.0005 to 0.1; arranging {10, 12} abnormal twin crystals in the rare earth magnesium alloy in advance through pre-deformation; performing fatigue test on the rare earth magnesium alloy with or without the abnormal twin crystals; compared with the rare earth magnesium alloy without the abnormal twin crystals, the fatigue limit of the rare earth magnesium alloy with the abnormal twin crystals is improved obviously; the fatigue life is prolonged; and the fatigue performance is obviously improved. The method is a process which is reasonable in design, simple in equipment requirement, convenient to operate, low in cost and high in efficiency and improves the fatigue performance of the rare earth magnesium alloy stably.