178 results about "Rheometer" patented technology

The present invention relates to a colloidal composition comprising unmodified, discrete cellulose microparticles, such as a colloidal emulsion or colloidal gel, a method of preparing the colloidal composition and uses of the colloidal composition and cellulose particles The colloidal composition comprises a continuous phase and a dispersed phase, wherein the continuous phase is a liquid; wherein the dispersed phase comprises cellulose microparticles which are dispersed in the continuous phase of the colloidal composition, wherein the cellulose microparticles have a mean average particle length of from 0.1 to 20 µm a mean average particle width from 0.05 to 1.3 µm, and a maximum thickness not exceeding 0.2 µm determined by scanning electron microscopy; and an aspect ratio of length / width of 1 to 25, and wherein the colloidal composition has a flow index n of ≤ 1 determined by a rheometer at NTP (normal temperature (25°C) and pressure (1 atm)).

The invention discloses conductive silver paste for a solar cell and application of the conductive silver paste, and belongs to the technical field of conductive silver paste. According to the invention, the prepared silver paste is printed on a silicon wafer cell in a silk-screen printing manner, so that the good rheological property of printing can be obtained. And a rheometer is introduced for testing, and an SEM scanning electron microscope is introduced for checking the surface appearance of the silver grid line. The invention discloses a TOPCon silicon wafer for a silicon solar cell, which comprises the following components in percentage by weight: 82-90% of silver powder, 20-30% of glass powder and 20-30% of organic carrier. 2-5% of glass powder; and 8-13% of an organic carrier. The conductive silver paste with good rheological property is prepared by using a mixture of polyamide wax and hydrogenated castor oil in a mass ratio of 1: 1 as a thixotropic agent. The main grid silver paste for the silicon solar cell provided by the invention can be well matched with step-by-step printing of a cell piece, different proportions of the binder and the thixotropic agent are used, the photoelectric conversion efficiency is high, the peeling strength of the main grid is high, and the step-by-step printing main grid paste requirements of current different types of paste and cell pieces can be well met.

The invention provides a thixotropy quantitative characterization method of lithium slag-tailings cemented filling slurry, and relates to the technical field of metal ore remaining tailings and lithium slag treatment. Comprising the following steps: preparing to-be-tested slurry and setting test parameters; starting a rheometer to test the to-be-tested slurry to obtain multi-stage thixotropic data of the to-be-tested slurry; according to the multi-stage thixotropic data, constructing a curve of the apparent viscosity changing along with the test time; carrying out data fitting on the curve by adopting a thixotropic quantitative characterization method so as to obtain specific fitting parameters and a flocculation rate; calculating the thixotropy of the slurry by using a structural recovery rate formula; and analyzing and characterizing the thixotropy of the slurry by using the obtained structure recovery rate and flocculation rate to obtain a characterization result. The problem that in the prior art, the thixotropy experiment result is low in accuracy is solved.

The invention discloses a rheology-birefringence combined in-situ testing device and method based on chopper rotation frequency signals, belongs to the technical field of optical testing, and aims to solve the technical problems that an existing Spark-FB device is low in measurement accuracy and limits application scenes. The laser emitter emits a light beam along a set angle (forming an angle of 45 degrees with the horizontal plane), the light beam is converted into linearly polarized light through the polarizer, and an optical signal is modulated through the rotating chopper; the modulated light beam penetrates through a polymer sample to which a shear flow field is applied by a commercial rheometer, and transmission light carrying optical anisotropy information of the sample sequentially passes through a 1 / 4 wave plate and a polarization analyzer, and is finally received by a photoelectric detector and transmitted to a lock-in amplifier for analysis. According to the invention, an independent datum reference signal is provided through the chopper, decoupling and combination of a commercial rheometer and a birefringence light path are realized, and synchronous and accurate in-situ measurement of rheological and optical properties of a high polymer material under a deformation condition can be realized.

The invention relates to a method for coating a compacted powder cake, in particular for producing a capsule containing beverage powder. The method comprises the following steps: a) providing a compacted powder cake made of a powder containing at least one polysaccharide, b) providing a coating solution made of at least one polysaccharide for coating the compacted powder cake, c) applying the highly viscous coating solution to the compacted powder cake, and d) drying the coated compacted powder cake. The coating solution has a viscosity of between at least 400 mPas and at most 4000 mPas, preferably between 600 and 2500 mPas and particularly preferably between 800 and 1500 mPas, measured using a rheometer. The invention also relates to a capsule for preparing beverages.

The invention discloses a high-throughput automatic structure-streaming imaging method and device, and belongs to the technical field of biomedical engineering.The device comprises an imaging detection module used for achieving imaging detection of a printing model, the imaging detection module is provided with two combined optical paths of optical coherence tomography, fluorescence microscopic imaging or confocal microscopic imaging; and the data support module is used for realizing hydrogel interface microscopic observation under rheological loading, and the data support module is integrated with a rheometer based on a combined optical path of optical coherence tomography and fluorescence microscopic imaging. The OCT and FM combined common-path multi-mode imaging system is integrated with the rheometer and the cooperative control module, and a three-dimensional quantitative characterization method of parameters such as space collapse degree is combined, so that synchronous observation and accurate analysis of a microscopic-macroscopic structure and stress-strain are realized.

The invention relates to the field of flow-state solidified soil testing devices, and particularly discloses construction equipment and a construction process for scouring and repairing flow-state solidified soil for an offshore wind turbine foundation. Comprising an overwater carrying carrier, and a material mixing pool, a water adding stirring pool, a material conveying pipeline, a material conveying pump, a slurry conveying mechanism, a flow state solidified soil scouring performance testing device, a solidified soil rotational rheometer, a fluidity test bed, a detection material taking mechanism and a control center which are arranged on the carrier. The construction device is a complete technical system covering performance integrated testing, site construction real-time detection and complex environment coupling simulation, the dual problems that research and development of a flow-state solidified soil material is lagged and site repair quality control is insufficient are effectively solved, and the safety and reliability of offshore wind turbine foundation scouring repair engineering are guaranteed.

The utility model discloses a magnetic field liquid pressure difference sealing performance-rheological property synchronous measurement system which comprises a rheometer main body, a sealing rotor structure, a pneumatic pressurizing device, a temperature control and measurement device and a computer measurement and control device, the pneumatic pressurizing device comprises a constant pressure pump and a gas storage bottle, and is connected with the sealing rotor structure through a vent hole in the shell; the temperature control and measurement device comprises a temperature controller and a temperature control execution module which is arranged on the side wall of an outer cylinder at one end, close to the magnetic liquid area, of the magnetic function unit; the computer measurement and control device is connected with the optical encoder, the pressure sensor, the temperature controller and the torque control type motor. The system can simulate and test the sealing effect and rheological property of the magnetic liquid in a static state and a dynamic state, explores the actual influence of the magnetic liquid on the sealing property when the magnetic liquid flows, and supports the rheological test under the condition of multi-field coupling of a flow field, a magnetic field and a temperature field.

The purpose of the present invention is to provide a prepreg which uses a resin composition that can be cured in a short period of time and is capable of suppressing resin flow during molding, and which has high workability. A prepreg characterized in that the prepreg contains an epoxy resin composition and reinforcing fibers, the epoxy resin composition containing component (A): a urea compound; component (B): a thermoplastic resin; component (C): an epoxy resin having an oxazolidinone structure; and component (D): a bisphenol epoxy resin that is solid at 25 DEG C, and satisfies the following conditions (1) and (2). Condition (1): The minimum viscosity of the epoxy resin composition measured by a rheometer under the condition of 2 DEG C / min is in the range of 3.0-6.0 Pa.s. Condition (2): the gelation time value of the epoxy resin composition, as measured under the condition of 145 DEG C by CURELASTOMETER (Registered Trademark), is in the range of 2.0-5.0 min.

This invention relates to the field of coating performance testing technology, and more particularly to a testing method and evaluation system for the leveling and sagging properties of coatings. The coating is taken as a sample and tested in a rheometer: shear forces of a first low shear rate, a high shear rate, and a second low shear rate are sequentially applied to the coating, and the viscosity value of the coating over time is measured to obtain a shear rate-viscosity data curve; the recovery index RI is obtained from this curve; the viscosity value corresponding to 1 / n of the total time required from the start of the second low shear rate treatment to viscosity stabilization is obtained from the shear rate-viscosity data curve, and the viscosity value at the first low shear rate is calculated, and the ratio is used to obtain the stage recovery index RI. 1 / n The method of this invention can simultaneously measure the shear rate-viscosity data curves of multiple coatings, and can quickly and qualitatively evaluate the leveling and sagging properties of coatings at different thicknesses.

A resin film (100) having a core layer (2) and adhesive resin layers (1) respectively disposed on both sides of the core layer (2), the adhesive resin layers (1) being formed of an adhesive resin composition having a minimum viscosity of 500 Pa·s or more at a temperature of 40°C to 160°C as measured by a rheometer.

This invention provides a measuring device. The measuring device includes: a base with a working surface; a positioning structure movably disposed on the working surface, the positioning structure having a bearing end and a receiving end, the receiving end having a receiving recess; and a measuring structure disposed on the base. The positioning structure has a reference state and a positioning state. When the positioning structure is in the reference state, the end face of the receiving end is in contact with the working surface, and the measuring structure measures the height between the end face of the bearing end and the working surface. When the positioning structure is in the positioning state, the end face of the bearing end is in contact with the working surface, the receiving recess accommodates the non-measuring segment of the sample to be measured, the end face of the receiving end is in contact with the end face of the segment to be measured near the working surface, and the measuring structure measures the height between the end face of the segment to be measured away from the working surface and the working surface. This invention effectively solves the problem of poor efficiency in measuring the sample thickness of a rotational rheometer by operators in the prior art.

The invention concerns a printable composition comprising: i) at least 18 wt.% photo polymerization reactive compound (M) provided by a secondary acryl amide of the structure type H2C=CH-CO-NH-R1, with R1 represented by an organic residue, ii) photo polymerization reactive organic compound (N) which is different from (M) with the proviso that: all species of the reactive organic compound (N) have a viscosity of maximum 50 mPa s at 25 °C (measured according to DIN EN ISO 3219-2, August 2021, with the proviso that: use of rotational rheometer in cone-plate geometry: cone diameter 60 mm, zero-gap distance 0.061 mm, cone angle 0.5 °; use of active thermal cover and heat plate; use of shear-rate of 600 s-1; general temperature measurement range 25-70 °C) and iii) radical photo initiator (R), where the wt.% ratio of contained (N) to contained (M) is at least 1.3 and the wt.% is relative to the total weight of the composition.

This utility model belongs to the field of oil and gas extraction technology, and discloses a measuring device and a rotational rheometer for detecting the salt resistance of crosslinking agents. The measuring device for detecting the salt resistance of crosslinking agents includes a housing, a cover, a rotating assembly, and a liquid injection assembly. The housing is fitted into a supporting groove and has a communicating receiving chamber and a liquid injection channel, the liquid injection channel being located on the side wall of the housing. The cover is detachably fastened to the housing and has a through hole. The rotating assembly is located in the receiving chamber, and one end is rotatably mounted vertically in the through hole. The rotating assembly is connected to the output end of the rotational drive mechanism of the rotational rheometer. The liquid injection assembly includes a storage container, a liquid injection pipeline, and a liquid injection mechanism. One end of the liquid injection pipeline is connected to the storage container, and the other end is connected to the liquid injection channel. The storage container is used to store brine, and the liquid injection mechanism is located on the liquid injection pipeline. Using this measuring device to detect fracturing fluids can reduce the workload of workers and improve work efficiency.

The invention provides a silica aerogel modified PVDF / FKM thermoplastic elastomer and a preparation method thereof, specifically, silica aerogel is pretreated with a coupling agent KH570, ultraviolet light modification is performed, the silica aerogel is used for preparing modified fluororubber (FKM), and finally PVDF and the modified FKM are prepared into the PVDF / FKM thermoplastic elastomer in a torque rheometer. Performance testing is carried out on the PVDF / FKM thermoplastic elastomer, and results show that the crosslinking degree of the FKM is favorably improved through ultraviolet light treatment, the crosslinking degree of the FKM treated for 20 minutes is the maximum, the S '(MH) value is 20.56 dN.m, the tensile strength of the PVDF / FKM thermoplastic elastomer is the maximum and 24.5 MPa when the use amount of KH570 is 3%, and a positive correlation relation exists between the tensile strength and a torque value; and the heat conductivity coefficient of the elastomer modified by ultraviolet light is obviously reduced. The material can be used for corrosion-resistant cables and the like.

A precision coating composition that includes organic solvents and film-forming constituents, where the coating composition has a shear thinning rheological profile; and where under a shear rate of 0.1 s−1, the coating composition has a viscosity of from 1,000 cps to 30,000 cps measured using an Anton Paar MCR 301 or Anton Paar MCR 302 rheometer with a Double Gap Cylinder equipped with a DG26.7 measuring system at 25° C. The precision coating composition can be applied to a substrate using a precision applicator to form a coating layer over at least a portion of a substrate; and exposing the coating layer to a sufficient amount of energy for a sufficient amount of time for the coating layer to coalesce to form a uniform coating on the substrate, where the amount of energy does not cause an appreciable cure of the precision coating composition.

The present invention pertains to a multi-part cosmetic composition which has both a physical property providing good adhesion for preventing dripping during mixing at the time of use and during application to keratin tissues such as skin and hair, and a physical property providing ease of spreading after application.　The present invention provides a multi-part cosmetic composition which comprises a plurality of constituent preparations including a preparation I and a preparation II, wherein the preparations I and II each comprise a component (A) that is an ionic surfactant, a component (B) that is a cationic polymer, a component (C) that is a higher alcohol, and a component (D) that is a nonionic surfactant and have different viscosities at least at 30°C, and all of the constituent preparations are mixed together upon use. The viscosity ratio (preparation II / preparation I) of the viscosity of the preparation II at 30°C to the viscosity of the preparation I at 30°C is 3 or more, and the ratio of the shear viscosity a of a mixture prepared by mixing all of the constituent preparations together at a shear rate of 0.0037 S-1 to the shear viscosity b of the mixture at a shear rate of 139 S-1, i.e., (shear viscosity a / shear viscosity b), is 5000 or more when the shear rate is changed from 0.001 S-1 to 1000 S-1 and the shear viscosities are measured with a rheometer at 25°C.

The application provides a visual rheometer for simulating high-temperature and high-pressure environment in a well, and relates to the technical field of well rheometers.The rheometer comprises a rheometer body for detecting flow characteristics of a fluid, a mounting mechanism for mounting the rheometer body, a fluid being capable of flowing in the interior of the mounting mechanism, a mounting seat for mounting the mounting mechanism, and a fluid containing cavity and a heating assembly for heating the fluid being arranged in the mounting seat.The application aims at the problems of the prior rheometer, such as difficulty in stably and truly simulating high-temperature and high-pressure environment in an oil well, easy influence of measuring precision by pressure and non-Newtonian characteristics of the fluid, and insufficient visualization capacity, and realizes integrated integration of high-temperature and high-pressure environment simulation, rheological detection and real-time observation through systematic design of the mounting mechanism, the pressurizing mode, the isolation structure and the observation means, thereby improving the measuring precision of fluid rheological parameter measurement while ensuring the safety of the equipment.

1. The name of the design product: concrete mortar rheometer. 2. The use of the design product: for carrying out rheological test of materials. 3. The design points of the design product: in shape. 4. The picture or photo best indicating the design points: perspective view.

Rheometry systems for use with systems including pressurized polymer melt and / or other viscous materials are described. In one embodiment, a rheometer is connected to an associated system having a bent, curved, or bendable tube to allow the rheometer to measure rheological properties at a location that would otherwise be inaccessible to position the rheometer there due to the presence of an obstruction. Embodiments including rigid straight tubes for connecting the rheometer to the associated system are also described. In another embodiment, a flow-through rheometer is connected to an industry standard 1 / 2-20 thermowell orifice, which is commonly used to attach temperature and pressure probes to vessels containing viscous materials, such as extruders or injection molding systems.

An object is to provide a production method that is a method for producing a spherical particle material by a melting method and that makes a melting spheroidization ratio higher than the conventional method. A production method for a spherical particle material of the present disclosure achieving the above object includes: a raw particle material preparation step of preparing a raw particle material composed of an inorganic material; and a spheroidization step of feeding the raw particle material into a high-temperature atmosphere to melt the raw particle material and then rapidly cooling the raw particle material to prepare a spherical particle material having a volume average particle diameter of 1 μm or more and less than 10 μm, and a powder compressibility evaluation FF value, by a powder rheometer, of the raw particle material is 2.0 or more.

A furan-based anionic sulphate free surfactant comprising: a) a head group comprising i) a furan ring ii) a sulphonate group attached to the furan ring b) an amide containing linker group; and c) a hydrophobic alkyl tail group having a carbon chain length of 8 to 18 wherein the furan-based anionic sulphate free surfactant has the structure of Formula (I) where R is a hydrophobic alkyl tail group having a carbon chain length of 8 to 18, 18:1 and 18:2 where R groups of different chain lengths can be used in combination as a blend, preferably a blend of chain lengths of C12 and C14, where X is a counterion, selected from organic and inorganic counterions; and its use in isotropic micellar phase cleansing compositions is used in an isotropic micellar phase cleansing composition further comprising a co-surfactant selected from a zwitterionic surfactant, an amphoteric surfactant and mixtures thereof; and water; wherein the composition has a viscosity in the range of from 1,000 to 50,000 mPa.s, preferably from 1,000 to 25,000, more preferably from 2,000 to 25,000 mPa.s, even more preferably from 2,100 to 15,000 mPa.s, when measured at 25 degrees C and 4s-1, using sandblasted 40mm parallel plates, on a Wingspan rheometer (TA instruments).

The invention relates to the technical field of fracturing fluid, and discloses a quantitative sampling device which comprises a container (4) capable of containing jelly and a cutter (5), a gap is formed in a preset position on the outer wall of the container (4), and the cutter (5) can be inserted into the gap to cut and separate the jelly in the container (4) into an upper part and a lower part. An opening capable of being opened and closed is formed in the bottom of the containing tool (4). According to the technical scheme, blended jelly is placed in the container, the cutter is inserted into the gap to cut the jelly, the amount of the cut jelly is a fixed amount, the position of the gap can be set according to the amount of the jelly required by the sleeve of the rheometer, quantitative cutting of the jelly can be achieved, and the cutting efficiency is improved. The cut jelly flows into the rheometer sleeve through the opening in the bottom of the container, so that the jelly is sampled, the operation is simple, the sampling is accurate, and the efficiency is high.

Provided is a resin composition capable of forming a film having a low dielectric loss tangent in a high-frequency band and reduced film thickness unevenness. The resin composition contains a thermoplastic liquid crystal polymer, has a dielectric loss tangent of 0.0015 or less at 5 GHz, and has a decrease rate of 20% or less in complex viscosity [eta] * 7 minutes after switching to a frequency of 100 rad / s after 12 minutes of measurement using a rotary rheometer at a frequency of 1 rad / s.

The invention provides a copper paste which can reduce the number of steps for forming copper pillars and can reduce the bonding temperature compared with the prior art. A copper paste for producing a copper pillar for semiconductor connection, which contains copper particles and a dispersion medium that contains a basic compound and a reducing organic substance, and wherein: the molar ratio of a basic group contained in the basic compound to an acidic group contained in the reducing organic substance (basic group / acidic group) is 0.5-1.2; the viscosity of the copper paste measured by a rheometer at 25 DEG C and a shear rate of 10 s <-1 > is 0.1-200 Pa * s.

A polyacrylic acid (salt)-based super absorbent polymer has a slip strain (%) of 12.5% or less after the polyacrylic acid (salt)-based super absorbent polymer is subjected to 30% swelling. The slip strain means a value at a time when a storage modulus rapidly decreases with an increase in strain when a change in the storage modulus is observed by increasing the slip strain of each sample from 0.01% to 100% using a rheometer under a frequency of 1 Hz and a temperature of 25° C. The superabsorbent polymer has an absolute value of a rate of change in slip strain at 30% and 70% swelling derived by Equation 1 of 0.04 or less, wherein Equation 1 is Rate of change in slip strain at 30% and 70% swelling=[{(slip strain at 70% swelling)−(slip strain at 30% swelling)} / 40].

The present application relates to the field of chip encapsulation, and particularly relates to a chip encapsulation and a preparation of an embedded chip conveying belt, wherein natural rubber and butadiene rubber are put into a torque rheometer, then an activator, a composite wave-transparent agent, modified rice husk and paraffin oil are sequentially added, mixing is carried out, standing is performed, sulfur, a scorch retarder and an accelerator are added, mixing is carried out, a mill is used to press a sheet, cooling is performed, and a chip encapsulation is obtained; lignin and silicon dioxide are extracted and precipitated from the rice husk by using an alkali extraction and an acid co-precipitation method, a nano-sized spherical lignin-silica hybrid material is obtained by self-assembly through intermolecular hydrogen bonds as a pretreated rice husk, the aldehyde group of the pretreated rice husk is modified, and then a phosphorus-amine ionic liquid is grafted; silicon nitride, glass fiber and aramid fiber are compounded as a wave-transparent agent, the wave-transparent agent is epoxidized first, and then the phosphorus-amine ionic liquid is grafted.

The proposed development is a rheometer device that simultaneously measures viscosity (μ) and yield strength (to) online, with measurements taken at intervals of a few minutes for mining slurries. Therefore, the design must withstand the typical conditions of a mining operation (extreme temperatures, high altitude, communication problems, distance, extreme humidity, theft, mishandling, etc.). The rheometer in this development is based on the laminar flow transport of the slurry through capillaries. This rheometer measures simultaneously in more than one capillary. The online measurement and data analysis system accounts for the effects of sedimentation, capillary or pipe wall effects, temporal effects (e.g., thixotropy and viscoelasticity), and capillary inlet effects.On the other hand, it considers losses due to changes in diameter, the oscillatory effects of the point generated by the peristaltic pump, and the overreactions generated when the speed changes. A method for operating the rheometer device is also presented.

To provide a multi-agent type cosmetic composition having both physical properties of exhibiting good adhesiveness to prevent dripping when mixed in use or when applied to keratin tissues such as skin and hair, and physical properties of exhibiting spreadability after application.SOLUTION: A multi-agent type cosmetic composition comprising a plurality of constituent agents including the following components (A) an ionic surfactant, component (B) a cationic polymer, component (C) a higher alcohol, and component (D) a nonionic surfactant, wherein the composition comprises agents I and II having different viscosities at least at 30°C, and the viscosity ratio (agent II / agent I) of the viscosity of agent II at 30°C to the viscosity of agent I at 30°C is 3 or more, and a ratio (shear viscosity a / shear viscosity b) of a shear viscosity a at a shear rate of 0.00037 s-1 to a shear viscosity b at a shear rate of 139S-1, which is measured by a rheometer at 25 °C. when the shear rate is changed from 0.0001 s-1 to 10000s-1, is 5000 or more.

The invention relates to a polyamide composition, a polyamide self-crimping fiber and a preparation method thereof, the composition comprises a first component and a second component, the first component comprises polyamide 56, and the second component comprises polyamide 6; the mass ratio of the first component to the second component is (45-55): (45-55); the difference value between the shear viscosity V56 of the first component and the shear viscosity V6 of the second component meets the following relationship: V56 and V6 are equal to 15-70 Pa.s; wherein V56 and V6 are respectively shear viscosities, measured by a capillary rheometer, of the first component and the second component under the conditions that the temperature is 270 DEG C and the shear speed is 10000 s <-1 >. The polyamide composition provided by the embodiment of the invention is used for preparing polyamide self-crimped fibers, and the prepared fibers can have good mechanical properties and excellent elasticity.