90 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 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 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.

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.

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.

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.

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.

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.

A renal replacement apparatus (100), having a hemofilter (108); an extracorporeal blood circuit (102) configured to communicate blood from a patient (104), through the hemofilter, and back to the patient; and a flow measuring device (150) configured to measure at least one blood flow property as the blood is leaving the hemofilter and before the blood returns to the patient at a flow measuring device location (152), wherein the flow measuring device comprises at least one of a viscometer and a rheometer. Alternately, or in addition, the renal replacement apparatus may include thermomodulator system (222) including at least one thermomodulator configured to selectively heat and cool the blood in the extracorporeal blood circuit. The renal replacement apparatus (100) may have a controller (160). The controller may use artificial intelligence. Other embodiments are described herein.

1. The name of the design product: thickening instrument (NZCQ series). 2. The use of the design product: a pressurized thickening instrument applied to the oil well cementing industry for detecting the thickening performance and thickening time of oil well cement under high temperature and high pressure environment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 2 perspective view. 5. The bottom of the design product is not easy to see or not visible during use, omit design 1 view; the bottom of the design product is not easy to see or not visible during use, omit design 2 view. 6. Design 1 is designated as the basic design.

A rheometer shaft system includes an output shaft including an axial thrust disk, an upper air bearing surrounding the output shaft located above the axial thrust disk, and a lower air bearing surrounding the output shaft located below the axial thrust disk. An upper gap separates the axial thrust disk of the output shaft and the upper air bearing. A lower gap separates the axial thrust disk of the output shaft and the lower air bearing. An airflow detection system is configured to detect a change in airflow to the upper air bearing and the lower air bearing based on the movement in the axial direction of the output shaft. This change in airflow can be used to monitor normal force applied to the rheometer shaft.

Improved rheometry is provided using an autonomous swimming robot that can be driven at least in an angular velocity mode and in a torque mode. The resulting improved capability can enable measurement of multiple rheological parameters, such as both normal stress components ψ1 and ψ2, by observing motion of the robot in the fluid. The robot is preferably rotationally symmetric, but with a fore-aft head-tail asymmetry that enables propulsion in complex fluids when the head and tail are driven to rotate opposite each other about the rotational axis of symmetry.

The utility model discloses a spiral rotor of a rheometer, which belongs to the technical field of shield muck improvement and comprises a connector used for being connected with a rheometer machine body, the connector is detachably connected with a rotating shaft, the bottom of the rotating shaft is fixedly connected with a measuring head, and a spiral blade is fixedly connected outside the measuring head. And the measuring head and the spiral blade are arranged corresponding to a sample container on the rheometer machine body. According to the utility model, the problem of soil compaction can be solved, the rheological property of the soil body in the spiral conveyor in a flowing state can be reflected more truly, and the accuracy of a measurement result is improved; the measuring head extends into the sample to be measured, the change of soil rheological properties can be more sensitively sensed, powerful support is provided for accurate measurement and evaluation of soil rheological parameters, and a more accurate measurement result can provide technical support and theoretical basis for application of muck improvement in treatment of blockage and spewing of a spiral conveyor.

The present invention pertains to a multi-agent cosmetic composition having both physical properties that exhibit good adhesion for preventing dripping during mixing at the time of use or during application to keratin tissue such as skin or hair, and physical properties that exhibit ease of spreading after the application.　Specifically, the present invention pertains to a multi-agent cosmetic composition that contains the following components (A) an ionic surfactant, (B) a cationic polymer, (C) a higher alcohol, and (D) a nonionic surfactant, that contains a plurality of constituent agents including an agent I and an agent II that have different viscosities at least at 30℃, and that is to be used by mixing all of the constituent agents at the time of use. The viscosity ratio (agent II / agent I) of the viscosity of the agent II at 30°C to the viscosity of the agent I at 30°C is 3 or more, and, in a mixture obtained by mixing all the constituent agents, the ratio (shear viscosity a / shear viscosity b) of the shear viscosity a at a shear rate of 0.0037 S-1 to the shear viscosity b at a shear rate of 139 S-1 measured at 25°C by a rheometer when the shear rate is changed from 0.001 S-1 to 1000 S-1 is 5000 or more.

The present invention relates to a method for obtaining a graphene liquid dispersion, to a graphene liquid dispersion and to uses thereof, in particular as a conductive additive for electrodes. In particular, the present invention relates to a graphene liquid dispersion comprising a solvent, a polymer and at least 0.1 g / L of graphene, and having an absolute viscosity measured at 25°C using a rheometer of between 5 mPa·s and 10 Pa·s.

The invention belongs to the technical field of degradable polyester plastics, and particularly relates to a high-strength degradable polyester composite material and a preparation method thereof. The preparation method of the high-strength degradable polyester composite material comprises the following steps: adding 80-90 parts by weight of degradable polyester, 10-20 parts by weight of lignin and 0.8-1.6 parts by weight of a plasticizer into a torque rheometer for melt blending, and then transferring the mixture into a press vulcanizer for compression molding to obtain the high-strength degradable polyester composite material, the degradable polyester plastic is prepared from full bio-based raw materials, so that not only is the degradability of the material ensured, but also the good mechanical property of the material is ensured.

The polyethylene of the present invention is characterized in that it has an oxidation induction time of 10 minutes or more at a temperature of 210 to 230°C as measured by a rotational rheometer, and there is a peak corresponding to polypropylene when measured by NMR.

An adhesive layer (20a) has a creep deformation rate when a stress of 10000 Pa is applied at 50° C. for 1 second is 10% or less, and a creep deformation rate when a stress of 10000 Pa is applied at 50° C. for 30 minutes is 16% or less, in a creep test using a rotational rheometer, and has a 180° peel adhesive strength of 10 mN / 20 mm or more with respect to a PMMA film.

1. The name of the design product: rubber rheological sample preparation machine. 2. The use of the design product: for rubber dumbbell piece sample and mooney sample. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

The invention relates to a rheometer device for determining rheological properties of a sample. Such a rheometer device (1) comprises at least one measuring unit (2), a receiving device (3) having at least one drive unit (4), and an evaluation unit (7) having an evaluation program (8), which is coupled to the at least one measuring unit (2) and to the receiving device (3), respectively. In this case, the receiving device (3) is designed to receive and move in a defined manner a plurality of at least partially different sample containers (5) having respective sample contents (6), such that a plurality of sample contents (6) in a respective sample container (5) can be measured simultaneously in parallel. In addition, a corresponding method M is disclosed.