648results about How to "High expansion rate" patented technology

A packer or bridge plug uses a sealing element made from a shape memory polymer (SMP). The packer element receives heat or other stimulus to soften the SMP while the element is compressed and retained. While so retained, the heat or other stimulus is removed to allow the SMP to get stiff so that it effectively seals a surrounding tubular. High expansion rates are possible as the softness of the material under thermal input allows it to be reshaped to the surrounding tubular or to the surrounding open hole from a smaller size during run in and to effectively retain a sealed configuration after getting stiff on reduction in its core temperature while longitudinally compressed. The SMP or equivalent material whose modulus is changeable can be covered on the outside, the inside or both with an elastic material that protects the SMP and enhances the seal in the wellbore and against the mandrel.

A portable and disposable device is provided for processing harvested dermal tissue. The device includes a housing presenting a handle having a gripping surface and a cutting head attached to the handle. A cutting assembly is supported by the cutting head and includes a plurality of spaced cutting blades that are rotatable with respect to the housing. A receptacle is disposed downstream of the cutting assembly and receives the sliced tissue from the cutting blades. The device is thus operable to slice harvested tissue into strips, and further into fine particles, that can be used for transplantation onto a wound site.

The invention relates to the technical field of soldering pastes, in particular to a halogen-free tin-bismuth-copper soldering paste and a preparation method thereof. A soldering flux of the halogen-free tin-bismuth-copper soldering paste consists of the following components in percentage by weight: 20 to 40 percent of polymerized rosin, 1 to 6 percent of rosin amine, 4 to 8 percent of thixotropic agent, 5 to 10 percent of organic acid, 5 to 10 percent of organic amine, 1 to 5 percent of antioxidant, 0.5 to 3 percent of surfactant and an organic solvent. The halogen-free tin-bismuth-copper soldering paste is mainly characterized by adopting the organic acid and the organic amine serving as activating agents and comprising no halogens at all, so not only the solderability is not reduced, but also the expansion rate and the insulation resistance value of the soldering paste are improved, and simultaneously the corrosivity of residues after soldering to a base material is reduced and the service life of the soldering paste is prolonged; and particularly, the peak temperature of the soldering paste during soldering is lower in favor of reducing the thermal damages to electronic components.

An apparatus for use in a well. The apparatus comprises a mandrel containing a radial shoulder, a sub member concentrically disposed about the mandrel, and an upper slip, concentrically disposed about the mandrel, for engaging the well. The apparatus further comprises an upper cone abutting an underside of the upper slip, and wherein the upper cone is disposed about the mandrel, and an elastomer operatively associated with the upper cone, and wherein the elastomer is disposed about the mandrel. The apparatus further includes a lower slip, concentrically disposed about the mandrel, for engaging with the internal portion of the well, and lower cone abutting an underside of the lower slip, and wherein the lower cone is disposed about the mandrel, and wherein the lower cone is operatively associated with the elastomer. The apparatus further contains a first alignment member selectively connecting the sub with the upper slip, and wherein the first alignment pin is selected to shear at a first predetermined force.

Expandable medical implants for maintaining support of a body lumen are disclosed. These implants comprise an axially-radially nested, diametrically expandable, moveable vascular device for enlarging an occluded portion of a vessel. The device can be configured to allow for motion such as translating and/or slide and lock. One advantage of the axially-radially nested stent is that it maintains the expanded size, without significant recoil.

A technology for pre-processing the stems of tobacco leaves includes heating the low-loss granular solid microwave medium as thermal medium to 100-200 deg.c, mixing said stems with said thermal medium, heating in microwaven over for puffing the stems, and separating the tobacco stems from thermal medium. The pre-processed stems feature high loseness and elasticity, and good smell.

A drill-following reamer comprises an upper joint, a reamer body, a piston nozzle, a piston, a compression spring, a blade, a pin shaft and a limit stop. The upper part of the whole set of device is connected with a drilling tool through the upper joint, while the lower part is connected with a drill bit through a screw thread. During drill-following reaming operation, the liquid piston nozzle pumped on the ground produces pressure drop to push the piston to move downwards, a groove on the piston pushes a gear structure on the blade to rotate the blade outwards by using the pin shaft as the center when the piston moves downwards till the blade is limited by the limit stop, and then the blade is expanded to reach the maximum outside diameter to start the drill-following reaming operation. 78.6 percent of drill hole expansion rate can be achieved by using the drill-following reamer, so the drill hole expansion rate is high; the blade has the mechanical locking function and is not retracted due to the extrusion of the well wall, so the diameter of the reamed drill hole is regular; and because the drilling and the reaming are carried out at the same time, the drilling cost is saved.

The invention relates to hot rolling ferrite/bainite high strength steel and a manufacturing method thereof. The hot rolling ferrite/bainite high strength steel comprises the following main chemical components by mass percentage: 0.05-0.10% of C, 0.20-0.50% of Si, 0.80-1.30% of Mn, 0.02-0.06% of Alt, 0.40-0.8% of Cr, less than or equal to 0.09% of P, less than or equal to 0.010% of S, less than or equal to 0.006% of N, and the balance of Fe and unavoidable impurities. The manufacturing method of the hot rolling ferrite/bainite high strength steel comprises the steps of molten iron pretreatment, converter smelting, alloy fine adjustment and argon blowing, LF (ladle furnace) refining, a continuous casting heating technology, a rolling technology, a cooling technology and a rolling technology. According to the steel and the method, C and Mn contents are strictly controlled based on the composition of C-Mn steel, an Si content is reduced, Cr and P are added appropriately, Nb, V and Ti microalloy elements are not added, noble alloys such as Mo and Ni are not added, the cost is lowered greatly, the hot rolling ferrite/bainite dual phase steel with the tensile strength reaching 550-650MPa is obtained by adopting an appropriate rolling and cooling control technology, a hole expansion rate is high, and the forming property is excellent.

Heat-expandable microspheres include a shell of thermoplastic resin and a blowing agent encapsulated therein having a boiling point not higher than the softening point of the thermoplastic resin, have a maximum expanding ratio not lower than 50 times, and are thermally expanded into hollow particulates having a repeated-compression durability not lower than 75 percent. The method of producing the heat-expandable microspheres includes the steps of dispersing an oily mixture containing a polymerizable component and the blowing agent in an aqueous dispersing medium containing a specific water-soluble compound and polymerizing the polymerizable component contained in the oily mixture.

A non-aqueous electrolyte secondary battery that has a high electrical capacity and exhibits excellent cycle characteristics even when the battery is rapidly charged and discharged at a large current includes: a positive electrode capable of reversibly absorbing and desorbing Li; a negative electrode; and a non-aqueous electrolyte. The negative electrode includes an alloying material that is capable of electrochemically absorbing and desorbing Li, and includes an A phase composed mainly of Si and a B phase including an intermetallic compound of at least one transition metal element and Si. The transition metal element is selected from the group consisting of Ti, Zr, Ni, Cu, and Fe. At least one of the A phase and the B phase includes a microcrystalline or amorphous region. The weight percent of the A phase relative to the total weight of the A phase and the B phase is greater than 40% and not greater than 95%.

Provided is a polyamide resin composition which can provide an expanded molding being superior in heat resistance and sufficiently reduced in weight and having high load resistance by a simple molding process. The polyamide resin composition is characterized by comprising a polyamide resin (A), a glycidyl-group-containing styrene copolymer (B) having two or more glycidyl groups per molecule, a weight average molecular weight of 4000 to 25000 and an epoxy value of 400 to 2500 Eq/1×10⁶ g and an inorganic reinforcing material (C) in a proportion such that the content of the glycidyl-group-containing styrene copolymer (B) is 0.2 to 25 parts by mass and the content of the inorganic reinforcing material (C) is 0 to 350 parts by mass relative to 100 parts by mass of the polyamide resin (A).

The invention discloses a preparation method of a high-diffusivity water-absorbent resin. The preparation method comprises the following steps: adding acrylic acid, a 50% sodium hydroxide solution, a compound cross-linker, sodium bicarbonate, ethanol, silicon dioxide and deionized water to a reactor, mixing evenly, and then introducing nitrogen for 20 min to remove oxygen; next, adding an initiator at a temperature within the range of 5-10 DEG C to initiate a polymerization reaction, terminating the reaction when the temperature stops rising, and preserving heat for 2 hours at a temperature above 80 DEG C, thereby obtaining polymeric colloid; pelleting the colloid to obtain resin particles and drying at 180 DEG C until the moisture content is lower than 3%; and finally, evenly spraying a surface treating fluid to the particles for surface treatment, and preserving heat at 180 DEG C for 40 minutes, thereby obtaining the product. According to the preparation method of the high-diffusivity water-absorbent resin, the resin particles are of a loose porous structure, numerous pore passages are formed inside the resin particles and the contact area is greatly increased, and therefore, the high-diffusivity water-absorbent resin has an instantaneous absorption effect; and the pore passages are in contact and connected in series with each other, and due to the capillary action, moisture can be transferred among the particles smoothly.

A foamed sole according to the present invention includes a foam molding containing a rubber component and a resin component, wherein the maximum value of a loss factor [tan δ] at a frequency of 10 Hz and at 30° C. to 80° C. of the foam molding is 0.18 or less, and a peak of a loss factor [tan δ] at a frequency of 10 Hz of the foam molding lies within the range of 100° C. or higher. The foamed sole has a feature that it hardly shrinks when it is heated.

The invention provides a method for preparing hydrated adhesive, which solves the problems of disposable usage, difficultly-controlled pasting position, difficult removal and the like in the traditional tackifier fundamentally. The technical key points of the invention are as follows: the hydrated adhesive is prepared by mixedly stirring the following raw materials by weight percent at normal temperature and pressure: 10%-35% of sodium alga acid (C6H7O8Na), 5%-30% of competed hydrate, 20%-50% of water-soluble adhesive and 5%-65% of water. The hydrated adhesive in the invention has the advantages of controllable viscosity, stable physicochemical property, environment protection, capability of repeated use, no residual and the like, and is suitable for caking of solid materials such as various paper, plastic and the like.