70 results about "Pressure cycle" patented technology

The invention discloses an acrylate conductive composite pressure-sensitive adhesive and a preparation method thereof. The acrylate conductive composite pressure-sensitive adhesive comprises a raw material A and a raw material B, wherein the raw material A comprises 5-15 parts of acrylate polymer; 0.10 to 1.00 parts of epoxy resin; 1.0 to 10.0 parts of aniline; 0.1 to 1.0 part of an initiator; 1-5 parts of conductive particles; and 0.010 to 0.100 part of an amine curing agent. The acrylate conductive composite pressure-sensitive adhesive disclosed by the invention has excellent conductivity and capacitance sensing performance, and shows excellent capacitance stability and relatively high sensitivity in a pressure cycle test; on the basis of containing the conductive filler, the pressure-sensitive adhesive still has better hardness, adhesion strength and tensile strength, and the conductive filler is well dispersed and combined in a pressure-sensitive adhesive system.

The invention relates to an air compression energy storage method and system based on liquid pressure control, which can improve the energy storage capacity of compressed air energy storage under the condition that the volume of an underground cavity is not increased by means of the action of liquid for pressure control in the underground cavity. The technical problems that in the prior art, the energy storage capacity can only be improved by increasing the size of the underground gas storage cavity, and site selection is difficult and cost is high when the size of the underground gas storage cavity is increased are solved. Moreover, the liquid is injected into the underground cavity, so that the pressure of the underground cavity is kept stable in the energy storage and release processes, on one hand, the energy storage capacity is improved, and on the other hand, the influence of pressure circulation fluctuation on the integrity of the underground cavity is reduced.

The invention belongs to the technical field of safety inspection and detection of special equipment, and particularly relates to a gas cylinder limiting temperature and pressure cyclic fatigue test medium flow control device which comprises an inflation and deflation pipe, a gas cylinder limiting temperature and pressure cyclic fatigue test medium flow control device, a gas cylinder limiting temperature and pressure cyclic fatigue test medium flow control device and a gas cylinder limiting temperature and pressure cyclic fatigue test medium flow control device, a first pipe opening and a second pipe opening are formed in the charging and discharging pipe, and one-way mechanisms are arranged between the connecting pipe and the first pipe opening and between the connecting pipe and the second pipe opening. The first pipe opening and the second pipe opening communicate with the connecting pipe, and the opening directions of the two one-way mechanisms are opposite. During use, the first pipe orifice and the second pipe orifice are both located in the gas cylinder. The purpose of the invention is as follows: through the mutual cooperation of the charging and discharging pipe, the first pipe orifice, the first one-way mechanism, the second pipe orifice and the second one-way mechanism, an experimental medium enters and exits from the pipe orifices at different positions of the gas cylinder, so that the experimental medium flows in the gas cylinder, and the temperature of the medium in the gas cylinder is relatively balanced through the flowing of the experimental medium; therefore, the temperature difference of the gas cylinder body is reduced, and the experiment precision is improved.

The invention relates to the technical field of porous carbon washing and filtering, in particular to a porous carbon washing and filtering tank which comprises a washing and filtering tank body, the top of the washing and filtering tank body is fixedly connected with a driving source through a supporting frame, and the output end of the driving source is fixedly connected with a stirring rod through a transmission rod. Through the arrangement of the circulating cleaning mechanism and other components and the mutual matching relation between the driving source and the circulating cleaning mechanism, the rotating motion of a transmission rod can be converted into the rotation of a driving eccentric wheel through a bevel gear pair, and then a compression ring is driven by a connecting rod to do reciprocating motion in a compression column; therefore, the device can achieve the effect of continuous and automatic pressure circulation of pressurization, pressure maintaining and negative pressure in the filter washing tank body only by means of one driving source, the problem of energy attenuation of ultrasonic waves in deep micropores is effectively solved, meanwhile, porous carbon particle damage caused by too strong vibration is avoided through controllable air pressure circulation, and the service life of the filter washing tank is prolonged. Therefore, the problems of incomplete cleaning and material damage mentioned in the background art are solved.

The utility model provides fatigue test equipment, which belongs to the technical field of carrier rockets and comprises a storage tank, a pneumatic system and a water replenishing system. The pneumatic system communicates with the gas inlet and outlet through the proportional valve; the water replenishing system communicates with the liquid inlet and outlet; when the fatigue test equipment is used, liquid in the storage tank is pushed by the pneumatic system to enter the storage tank test piece, the fatigue test is carried out on the storage tank test piece under the action of the pneumatic system, the principle that water is pushed by air is adopted, and the fatigue test equipment is not influenced by the service life of a pressure reducing valve and a back pressure valve; the pressing precision, the pressure increasing rate and the pressure reducing rate can be better controlled in 20,000 times of pressure cycle fatigue tests; in the pneumatic system, the proportional valve is communicated with the storage tank, and the proportional valve has the characteristics of stepless adjustment of pressure and speed, low service power, less heat and low noise, so that impact fluctuation during reversing of a conventional switch type pneumatic control valve can be avoided, and pressure control is more direct and accurate.

A fluid flow control device for a downhole apparatus, the device comprising a body portion comprising a first fluid flow port and a second fluid flow port, a fluid flow path from the first fluid flow port to the second fluid flow port, and a valve member located in the fluid flow path and configured to be movable from a first, closed position in which the fluid flow path is blocked by the valve member, and a second, open position in which the fluid flow path is open. The valve member is configured to be movable from the first, closed position to the second, open position in response to a valve pressure cycle comprising application of a positive differential pressure from the first flow port to the second flow port, and removal of the positive differential pressure.

A wearable system and methods for modifying properties of eyes are provided. The system includes an ultrasonic device; at least one sealed cavity; a fluid and lighting environment control device; a controller; one or more feedback sensors; and a computing device. The method includes applying vibrations through actuators in contact with an eye socket bone through skin; warming a cavity to set temperature to a first temperature for a period up to a predetermined time except when the temperature exceeds a second temperature; setting vibration cycles after the set temperature is reached; initiating a cavity pressure cycling after the set temperature is reached and after the setting vibration cycles is completed; and completing the cavity pressure cycling and then completing the warming. The system and methods can be applied to surgical treatments, medications, finger massage, or used independently to modify the tissue properties of the eye.

The present invention relates to the field of braking technology, and in particular to a high- and low-temperature flexural fatigue test method for an air brake hose and its test bench. The method comprises extracting the full stroke of the vehicle's suspension up and down jumps and the full stroke of the steering left and right turns based on the motion characteristics of the vehicle's front and rear axles, fixing one end of the hose to be tested to the fixed end of a flexural circulation device on a test stand and connecting it to a pressure circulation device, and connecting the other end to a movable end and sealing it, and placing the entire test stand in a temperature-controlled test chamber. After the test parameters are set, the test is started, and the flexural circulation device, pressure circulation device, and temperature-controlled test chamber are started synchronously. When the number of working cycles of the flexural circulation device reaches a target preset value, the high- and low-temperature flexural fatigue test of the air brake hose is terminated. The present invention fully considers the bending conditions and high and low-temperature environments of the vehicle's air brake hose, shortens the vehicle verification cycle and verification costs, and is conducive to improving the design quality of the air brake hose.

A degassing device removes air dissolved in liquid under a pressure decreased atmosphere. The degassing device includes a liquid tank, a pressure decreasing device, a circulation flow pass, and a circulation device. The liquid tank stores the liquid. The pressure decreasing device decreases pressure in the liquid tank. The circulation flow pass communicates different positions of the liquid tank. The circulation device circulates the liquid through the circulation flow pass. The circulation flow pass includes an outlet port from the liquid tank to the circulation flow pass, and an inlet port from the circulation flow pass to the liquid tank below a liquid surface. A diameter of the inlet port is smaller than a diameter of the outlet port.

A method of aspirating a hematoma from a body space via a catheter coupled to a pump assembly includes advancing a tip of the catheter into proximity with the hematoma within the body space. The pump assembly includes a pump, a motor, a sensor, and a controller. The method further includes actuating the pump assembly to: operate the pump in a first mode during which the motor drives the pump at a first aspiration speed; receive at the controller a pressure signal associated with a catheter pressure from the sensor of the pump assembly; and on a condition that the catheter pressure is below a pressure threshold, operate the pump in a second mode during which the motor drives the pump cyclically between a second aspiration speed and an infusion speed such that the catheter pressure cycles between an upper pressure limit and a lower pressure limit.

A linear escapement mechanism is provided for actuating a downhole tool in a controlled and predictable manner, such as in response to a certain number of pressure cycles. In an example, the actuator includes an escapement sleeve axially moveable with respect to an actuator housing. The escapement sleeve has a plurality of axially-arranged escapement teeth. A rocker secured within the actuator housing has opposing first and second pallets. An operating sleeve is reciprocable to rock the rocker back and forth to alternately move the opposing first and second pallets into engagement with the escapement sleeve as the escapement sleeve advances axially in an actuating direction.

The invention provides a gas cylinder pulse type high-pressure circulation test device and method. The method comprises the steps that an oil pump pressurizes oil; an oil cylinder and a water cylinder are arranged in the pulse generator and are connected through a piston; the gas cylinder is communicated with one end of a water cylinder of the pulse generator through a pipeline; a piston between an oil cylinder and the water cylinder in the pulse generator reciprocates to control the pressure of the gas cylinder; the liquid filling and exhausting device is communicated and injects water into the pulse generator water cylinder; the pulse generator oil cylinder is communicated with the pulse generator oil pump; the servo valve and the proportional pressure reducing valve are communicated between the pulse generator and the oil pump and control the output oil pressure, and the water pressure of the pulse generator is proportional to the oil pressure; upper and lower limit values and frequency changes of circulating pressure of the oil cylinder and the servo valve drive the circulating pressure and frequency of the gas cylinder; oil in the servo valve and the pulse generator is pressurized and then flows back into the oil cooler to be cooled. The device has the advantages of being good in reliability, high in efficiency, accurate in precision, small in volatility and reliable in test result.

The application discloses a glass micro-matrix mold forming and compensation processing method based on air pressure dynamic balance, and belongs to the field of precise optical element manufacturing, and comprises the following steps: S1, forming a mold cavity structure suitable for a glass micro-matrix by processing a mold unit cell according to a preset process; S2, establishing a gas expansion pressure balance model, designing pressure cycle parameters, adding a glass blank into the mold cavity, performing a pressurization and pressure release cycle based on the parameters calculated by the gas expansion pressure balance model and the pressure cycle parameters, controlling glass shrinkage / expansion auxiliary exhaust by using a temperature gradient, and filling the mold cavity with the glass until the glass is completely filled in the mold cavity; and S3, constructing an air pressure-deformation coupling compensation model, calculating a compensation amount of each unit cell, converting the compensation amount into a grinding head feeding amount, and finally completing the processing of the glass micro-matrix element according to the grinding head feeding amount. The mold processing, dynamic mold pressing and compensation correction steps can be adapted to existing precise forming equipment, a production line does not need to be massively transformed, and industrialization cost is reduced.

The invention discloses a gas storage pressure design method and device based on heat-fluid-solid coupling simulation, computer equipment and a computer readable storage medium, and relates to the technical field of underground energy storage.The method comprises the steps that experimental data of a target gas storage are collected, a mechanical initial model is constructed, and parameters are initialized; establishing a heat-fluid-solid coupling model by combining a compressed air convective heat transfer process and mechanical behaviors; using injection-production historical data reverse verification and parameter inversion to set an operation pressure constraint criterion, executing multi-cycle pressure cycle simulation based on the verified model, and determining an optimal injection-production pressure through a parameter scanning or optimization algorithm; and post-processing a simulation result, outputting a designed life period operation pressure envelope diagram, and obtaining a safety pressure window of each stage. According to the method, the heat-fluid-solid coupling effect under multi-period injection and production is quantified, the critical pressure is dynamically determined, and the optimal balance of safety and economical efficiency of the gas storage is achieved.

The utility model provides a high and low temperature pressure cycle test system, which relates to the technical field of high and low temperature pressure cycle tests, and comprises an environmental box and a liquid storage box, the environmental box is provided with an accommodating cavity for accommodating a tested container, and the temperature in the accommodating cavity can be adjusted; the liquid storage tank is used for storing a medium; a liquid inlet pipeline and a liquid return pipeline are arranged between the liquid storage tank and the tested container; a high-pressure pump, a first high-pressure heat exchanger and a first one-way valve which are sequentially communicated are arranged on the liquid inlet pipeline in the liquid inlet direction, a liquid inlet of the high-pressure pump is communicated with the liquid storage tank, and a liquid outlet of the first one-way valve is communicated with the tested container; the first high-pressure heat exchanger is further connected with a first cooling and heating all-in-one machine, and the first cooling and heating all-in-one machine is used for heating or cooling media in the first high-pressure heat exchanger. According to the utility model, a pressure cycle test under medium temperature control and high and low temperature environments can be carried out on the tested container, and the performance of the tested container can be evaluated more comprehensively.

A method for separating a feedstock gas by pressure swing adsorption which produces a first gaseous fraction enriched in a first component and a second gaseous fraction enriched in a second component, the separation unit comprising a plurality of adsorbers, the pressure cycle comprising a plurality of steps including at least one adsorption step and at least one rinsing step in which a rinsing fluid enriched in a first component flows through at least one adsorber so as to flush at least some of the second component out of the adsorber, the pressure cycle having a phase time corresponding to the duration of the pressure cycle divided by the number of adsorbers.

The invention relates to the technical field of burn nursing, and particularly discloses a multifunctional burn nursing electric applicator which comprises the following steps: acquiring historical negative pressure data of the nursing electric applicator, carrying out negative pressure time-frequency verification by calculating a gel blocking coefficient, carrying out negative pressure period verification by calculating a variable coefficient of a negative pressure wave crest sequence, and calculating a gel blocking coefficient; whether gelatinous embolism exists or not is judged, a negative pressure plug removal set is obtained through elimination feasibility analysis of negative pressure on gel yield stress and screening, an initial thickness negative pressure set is determined by dividing an eschar thickness set and taking drainage efficiency and edema depth as indexes, the negative pressure plug removal set and the initial thickness negative pressure set are taken to be intersected, and a target thickness negative pressure set is determined. Embolism removal and eschar adaptation are both considered, and the treatment stability and safety of equipment are improved.

The invention relates to a reliability device for testing an optical microphone by simulating oil pressure and a testing method, and belongs to the technical field of optical sensor testing. The device mainly comprises a test box, an oil conservator, an air pressure system, a pressure control system and an ultrasonic signal generation system. The test box is pressurized through the blast pump and the oil conservator, and oil pressure environments at different depths in the transformer are accurately simulated by using a plurality of pressure release valves with different pressure thresholds. According to the invention, not only can the sensitivity and the minimum sensing amount of the optical microphone under different static oil pressures be tested, but also fatigue life evaluation can be carried out through controllable pressure circulation. The device has the advantages that the oil pressure control is accurate, the range is wide, the safety is high, the functions of vacuum simulation, ultrasonic excitation and the like are integrated, and a key test means is provided for model selection, point distribution and reliability evaluation of the optical microphone in the oil-immersed transformer.

The present application relates to the technical field of test device, provide a kind of variable volume pressure cycle hydrogen seal material performance test platform, including test box, driving device and transmission device, test box includes box and sealing cover, box is open at one end, sealing cover side is equipped with the containing slot for accommodating test piece, sealing cover is movably arranged in the open end of box, sealing cover can be switched between first position and second position, the volume of test box when sealing cover is in first position is greater than the volume of test box when sealing cover is in second position;Driving device provides power for the position switching of sealing cover;Transmission device drives sealing cover to move at uniform speed and can change the angle of sealing cover.Such setting, the alternative switching of sealing cover position, angle is realized by driving device and transmission device, the volume of test box and the internal pressure of alternative, variable speed change are realized, without complex control process, control process is significantly simplified, maintenance and test cost are reduced.

The invention discloses a method for inducing controllable collapse of an interlayer in a construction process of an ultra-deep salt cavern reservoir, which mainly comprises the following steps of: early-stage preparation and parameter design: completing exposure of a target interlayer, and obtaining mechanical parameters of the target interlayer through geological data and logging data; based on this, the peak value, valley value, rate and dwell time of the pressure cycle are designed. And fatigue load application: strictly executing designed pressure circulation through a wellhead pumping and flowback system. The rapid pressure reduction stage is the key of inducing crack propagation. Monitoring and feedback control: utilizing sonar to measure the cavity, and tracking the interlayer state and the collapse process. And adjusting cycle parameters according to a monitoring result to realize closed-loop control. According to the method, the damage of the interlayer is converted from passive waiting to active induction, the whole process is carried out under artificially set parameters, and the controllability is high.

The present invention discloses a flexible pressure sensor based on a liquid metal electrode and a preparation method thereof, relating to the technical field of flexible sensing. The flexible pressure sensor includes a liquid metal electrode layer and an ionic dielectric layer. The liquid metal electrode layer includes an upper electrode layer and a lower electrode layer. The upper electrode layer includes an upper electrode encapsulation layer, an upper electrode adhesion layer, and an upper liquid metal layer. The lower electrode layer includes a lower liquid metal layer, a lower electrode adhesion layer, and a lower electrode encapsulation layer. The ionic dielectric layer is disposed between the upper liquid metal layer and the lower liquid metal layer. The present invention uses liquid metal with both high conductivity and ductility as a sensing electrode, and comprehensively utilizes the wettability difference between the liquid metal electrode and the sensor substrate and the intermediate dielectric layer, and utilizes the characteristic that the substrate and the intermediate dielectric layer have a stiffness gradient to ensure the stability of the liquid metal electrode structure during the pressure cycling process, and avoid the interference of the interfacial double-layer capacitance by mechanical deformations such as stretching, bending, and folding.

This application is applicable to the technical field of waterproof performance testing, and particularly relates to a waterproof testing method for an energy storage exhaust valve and a fully automatic water spraying test device. The method includes: obtaining pressure information within a target time period; obtaining the number of change events; determining the number of pressure cycles; calculating the failure ratio of the number of leakage events to the number of pressure cycles; and determining whether the waterproof performance of the tested energy storage exhaust valve meets the standard according to the pressure information and the failure ratio. The waterproof testing method for the energy storage exhaust valve provided by this application can solve the problem that in the traditional waterproof testing process of the energy storage exhaust valve, it is often static, only testing the waterproof performance of the energy storage exhaust valve at a fixed pressure, and unable to truly reflect the dynamic pressure changes of the energy storage exhaust valve during actual operation, thereby resulting in inaccurate test results.

The present invention relates to a positive and negative pressure cycle pulse vibrating screen and a working method, comprising a frame, in which a vibrating screen is fixed, the vibrating screen comprising a vibrating motor, a screen bed, and a screen mesh, a feeding mechanism being correspondingly provided on the top of the vibrating screen, and a liquid-gas separation mechanism being connected at the bottom thereof for smoothly discharging the liquid, and an air source for suction and exhaust being installed on the frame, the exhaust port and the intake port of the air source being respectively connected to the positive and negative pressure interfaces of a positive and negative pressure pulse airflow control mechanism, the positive and negative pressure pulse airflow control mechanism forming an airflow passage with the screen surface of the screen mesh through a connecting mechanism and controlling the duration and time interval of the positive and negative pressures, the negative pressure pulse airflow flowing from the top of the screen to the bottom of the screen, and the positive pressure pulse airflow flowing from the bottom of the screen to the top of the screen; pressure regulating and gas releasing devices are both provided at the intake port and the exhaust port of the air source, the vibrating motor is connected to a frequency conversion device, and the air control system is further included at one side of the frame, and its control lines are respectively connected to corresponding electrical equipment.

This invention provides a method and system for feature extraction of strain measurement data from long-term service tank pressure cycling tests, comprising: Step 1: Introducing a Long Short-Term Memory (LSTM) module into the encoder structure of an autoencoder network model to capture long-distance feature correlations in long-cycle pressure cycling tests; Step 2: Introducing a gated recurrent unit into the decoder structure of the autoencoder network model to optimize the temporal signal reconstruction effect; Step 3: Training multiple autoencoder models to establish an important feature extraction network for tank pressure cycling strain observation data based on the autoencoder model; Step 4: Integrating variance filtering and mutual information maximization methods to construct a multi-layer, multi-criteria feature screening model; Step 5: Performing single-dimensional time-domain and frequency-domain feature extraction on the strain measurement data from the tank pressure cycling test, and inputting the preprocessed data into the important feature extraction network and the multi-layer, multi-criteria feature screening model to achieve key feature extraction of the test data.

This invention relates to the field of solid-state refrigeration materials with pressure-sensitive effects, and discloses a technical method for improving the adiabatic temperature change decay of plastic crystal materials under constant pressure cycling conditions. The method involves uniformly mixing ammonium iodide plastic crystal grains with silicone oil to form a coating composite system with lubricating and isolating functions. A spherical shell encapsulation structure is then fabricated using PA12 nylon powder via laser sintering 3D printing. The composite system is filled and sealed within the spherical shell to form a stable encapsulation unit. During programmed pressurization and depressurization cycles of the encapsulation unit under constant pressure conditions, the silicone oil effectively reduces inter-grain friction and stress concentration, while the spherical shell structure prevents the loss of the coating medium and maintains the integrity of the system, thereby significantly suppressing the decay of the adiabatic temperature change of the plastic crystal material with increasing cycle count.

The invention discloses an anti-fatigue high-pressure hydrogen storage container inner container for a hydrogen refueling station and a manufacturing method of the anti-fatigue high-pressure hydrogen storage container inner container, and belongs to the technical field of high-pressure gas storage. In order to solve the problem that an existing IV type hydrogen storage container inner container causes early fatigue failure due to the stress-hydrogen coupling effect, the inner container with the continuous gradient functional structure is provided, the material components, the pore structure and the macroscopic modulus of the wall of the inner container are in collaborative continuous gradient change from the inner surface to the outer surface, and therefore the stress distribution is optimized, and meanwhile the stress distribution is optimized. And infiltrated hydrogen atoms are actively guided to diffuse to a low-stress region, so that the initiation of hydrogen-induced fatigue cracks is inhibited from the source. The manufacturing method comprises the steps of digital reverse design based on phase field simulation and machine learning, multi-material additive manufacturing adopting dynamic slurry mixing and gray exposure and programmed post-processing. The pressure cycle life of the hydrogen storage container can be remarkably prolonged, and the transient safety and the structural reliability of the hydrogen storage container are improved.

The invention relates to the technical field of cylindrical lithium battery manufacturing, and particularly discloses a method for improving permeation after liquid injection of a cylindrical lithium battery, which comprises the following steps: processing a cylindrical lithium battery shell opening by a channeling tool to form a specific bevel angle and an R angle; the coating mechanism forms an oleophobic coating on the inner side of the shell opening; performing negative pressure leak detection on the lithium battery in a middle negative pressure environment; after the electrolyte is injected, transferring into an injection pressurizing cavity for pressure maintaining; positive and negative pressure circulation treatment is alternately performed for three times, and electrolyte is deeply permeated; and exhausting after two times of low-medium negative pressure treatment, and recovering normal pressure to finish pressure maintaining. According to the method, the oblique angle, the R angle and the micro-nano texture processing are carried out on the cylindrical lithium battery shell opening, and a nano-scale super-oleophobic coating technology is combined, so that the attachment and the residue of the electrolyte at the shell opening are inhibited. And the problems of equipment pollution, material corrosion, poor welding in subsequent procedures and the like caused by overflow of the electrolyte are effectively reduced, so that the rework rate and the rejection rate in the production process are reduced.

The present invention discloses a fuel injection calibration method, device, and related equipment for an engine bench test. The fuel injection calibration method for an engine bench test includes obtaining, at a first speed and a first load, pressure cycle variation coefficients and exhaust temperature boundary values ​​corresponding to multiple groups of injection angles according to angle steps and different injection angles; determining an optimal initial injection angle according to the pressure cycle variation coefficients and exhaust temperature boundary values; obtaining, at a first speed and a first load, multiple engine super knock parameters according to angle steps and different injection angles; determining an optimal end injection angle and injection ratio according to the super knock parameters; and repeating the above steps while changing the first speed and / or first load. The method achieves accurate calibration of the optimal initial injection angle, the optimal end injection angle, and the injection ratio, and by calibrating the performance of the economic fuel consumption zone, the workload of engine bench calibration can be greatly reduced.

This document discloses a method for dissolving a polymer resin, the method comprising: treating the polymer resin or a composite material containing the polymer resin with a first mixture of fluids for one or more pressure cycles; wherein the first mixture comprises a first superheated fluid and a first supercritical fluid; wherein each pressure cycle comprises a pressurization step, a pressure holding step, and a depressurization step; and treating the polymer resin or the composite material containing the polymer resin with a second mixture of fluids for one or more pressure cycles; wherein the second mixture of fluids comprises superheated water, a second superheated or supercritical fluid, and a third supercritical fluid; wherein the first superheated fluid and the second superheated or supercritical fluid contain fluids having a pressure between 15 MPa and... 1 / 2 With 40 (MPa) 1 / 2 The solvent between the Hildebrand solubility parameter and the solubility parameter.