77 results about "Polymer flow" patented technology

The application relates to a continuous macro-preparation device and method of a soft and elastic ceramic superfine fiber material, which sequentially comprises a feeding and liquid preparation system, a multi-jet uniform electrostatic spinning system, a low-temperature calcination system and a winding system. Raw materials are mixed, low-temperature dispersed and vacuum concentrated to obtain a sol; the sol and a polymer flow into a polymer mixing device to be mixed and bubble removed; the mixed sol flows into an inorganic component content control device to be pumped by negative pressure to obtain a spinning solution; the spinning solution flows into a multi-jet electrostatic spinning module to adjust and control the temperature, humidity and multi-directional differential speed during spinning to obtain a fiber membrane material or a fiber flake material; the fiber material is sequentially transmitted to a drying area, a microwave pretreatment area, a polymer removal area, an oxygen-poor atmosphere heat treatment area and a cooling area to be calcined in multiple temperature zones to obtain the soft and elastic ceramic superfine fiber material; and winding and packaging are realized to realize the continuous macro-manufacture of the soft and elastic ceramic superfine fiber material.

The invention relates to an oil displacement polymer rheological impedance characteristic characterization method based on an equivalent circuit method, which comprises the following steps: obtaining the total rheological impedance and phase angle of an oil displacement polymer under different shear rate conditions, and constructing and dividing a polymer rheological impedance characteristic characterization data set under a shear effect; constructing a series equivalent model for representing the rheological impedance characteristics of the polymer for oil displacement; constructing a parallel equivalent model for representing the rheological impedance characteristics of the polymer for oil displacement; constructing a composite equivalent model for representing the rheological impedance characteristics of the polymer for oil displacement; a grey wolf algorithm is introduced, on the basis of constructing a data set representing the rheological impedance characteristics of the polymer for oil displacement under the shear effect, the application limit of the equivalent model at different shear rates is optimized, and quantitative representation of the rheological impedance characteristics of the polymer for oil displacement is achieved. According to the method, the rheological impedance of the polymer for oil displacement under the shear effect is quantified, and quantitative and scientific characterization of the rheological impedance characteristic in the rheological property evaluation process of the polymer is ensured.

The invention discloses a polymer rheology modifier as well as a preparation method and application thereof, and belongs to the field of building materials. The polymer rheology modifier is prepared from an acrylic monomer A, an amide monomer B and a slow-release monomer C through free radical polymerization, and the mass ratio of the monomer A to the monomer B to the monomer C is 1: (2-5): (3-9). And the number-average molecular weight of the polymer rheology modifier is 1 to 4 million. The polymer rheology modifier provided by the invention can achieve the effects of large molecular weight and long acting time.

The present invention discloses an online continuous preparation and adjustment device and method for chemical drive. The online continuous preparation and adjustment device for chemical drive includes a polymer forced stretching system, a cross-linking mixing system and a polymer strong dispersion system; the cross-linking mixing system includes a first-order cross-linking mixing tube, a venturi tube and a second-order cross-linking mixing tube connected in sequence; an SD-type spiral plate is provided in the first-order AC mixing tube to make the polymer fluid generate a spiral flow and be evenly dispersed; the venturi tube is provided with a cross-linking agent injection port; the second-order cross-linking mixing tube is provided with an SK-type spiral plate and an SD-type spiral plate to accelerate the mixing of the polymer and the cross-linking agent by creating a spiral flow and turbulence. The present invention adopts an online dissolution process, eliminates the maturation tank, and adopts a two-stage cross-linking mixing tube and a venturi tube for mixing, thereby ensuring that the system is evenly dispersed and improving the maturation efficiency.

A multi-row coaxial blow-fusion system (1) is provided comprising a support (2) including one or more first conduits (20) configured to carry polymer fluid parallel to the supply direction (2a) and at least one second conduit (21) configured to carry air or gas, a housing (3) removably attached to the support (2) and including a plurality of acceleration conduits (30) extending parallel to the supply direction (2a) comprising the pipe (10) in fluid-pass connection with one or more first conduits (20) and configured to distribute the polymer fluid, first orifices (31) extending parallel to the supply direction (2a), centered and spaced with respect to the acceleration conduits (30) along the supply direction (2a) and configured to accommodate each part of a respective pipe (10),second orifices (32) extending parallel to the supply direction (2a) and capable of allowing the passage of air or gas, and a slit (33) extending transversely to the supply direction (2a) between the acceleration conduits (30) and the first orifices (31) in fluid passage connection with the second orifices (32), wherein the support (2) comprises a housing (22) configured to contain the box (3) and the slit (33) extends in the box (3) from side to side to be in fluid passage connection with the second conduit (21) and configured to carry air or gas from the second conduit (21) to the second orifices (32).

The invention relates to the technical field of biomedical materials, in particular to a method and equipment for preparing porous gelatin microspheres. The method for preparing the porous gelatin microspheres is realized by utilizing a micro-fluidic chip with a micro-mixing area and a micro-dispersion area and a curing system, and comprises the following steps: injecting gelatin derivative fluid and polymer fluid into the micro-mixing area at 30-60 DEG C, so that the gelatin derivative fluid and the polymer fluid flow and are mixed in the micro-mixing area, and the micro-mixing area is formed; and carrying out time sequence phase separation and self-assembly under the periodic influence of the microstructure of the micro-mixing region to form a micro-mixing fluid, and carrying out micro-dispersion and curing to obtain the porous gelatin microspheres. Loading a load into the fluid solution to prepare the porous gelatin microspheres containing the load. According to the method, the microsphere industrialization process of the porous gelatin material is simplified, the nano-structure characteristics of the porous gelatin microspheres can be efficiently reserved, the quality of the nano-structure porous gelatin microspheres is improved, and efficient development, batch production and application of porous gelatin products can be accelerated and promoted.

A plant (1) is provided for producing spunbond type nonwoven fabric extending along a main axis (1a) and a main plane (1b), defining a vertical axis (1c) of extrusion perpendicular to the main axis (1a) and the main plane (1b) and comprising an extrusion head (2) including at least one main channel (20) suitable for allowing polymeric fluid to pass; a dispenser (3) including at least one dispensing duct (30) in fluid passage connection with the main channel (20) and suitable for distributing the polymeric fluid parallel to the vertical axis (1c); at least one spinneret (4) including a plurality of first holes (40) each extending transversally to the main plane (1b) in fluid passage connection with the dispensing duct (30) and suitable for extruding the polymeric fluid to make a respective polymeric filament; wherein the spinneret (4) includes at least one slit (41) extending parallel to the main plane (1b) so as to allow air to pass through the spinneret (4), and a group of second holes (42) in fluid passage connection with the slit (41) and extending parallel to the first holes (40) so as to allow air to exit; and wherein the plant (1) further comprises conveying means (5) in fluid passage connection with the slit (41) and configured to convey air into the slit (41) in such a manner as to cool the first holes (40) and, thereby, the polymeric fluid before the polymeric fluid exits the spinneret (4) and likewise the polymeric fluid immediately at the exit of the spinneret (4) and also between the first holes (40).

The application discloses a loose sandstone oil reservoir intelligent layered polymer injection pipe column and a construction method, the polymer injection pipe column comprises at least two layered polymer injection units connected through oil pipes, the layered polymer injection unit comprises a layered packer and an intelligent adjusting injection device, the intelligent adjusting injection device is arranged below the layered packer, and the intelligent adjusting injection device is internally provided with anti-adsorption gravel; at least two levels of intelligent adjusting injection devices are arranged in one layered polymer injection unit, and the filling coefficients of the anti-adsorption gravels in each level of intelligent adjusting injection devices are different. The application discloses the idea of abandoning the polymer flow regulation of the current throttling unit, and innovatively adopts the pre-filling technology with different filling coefficients to regulate the flow, so that the viscosity retention rate is not affected by the machining precision, and the viscosity retention rate is relatively high.

The meltblown system includes a die including a die inlet end for receiving molten polymer from a polymer source, a cavity through which the molten polymer flows downstream of the die inlet end, and a die outlet end for receiving the molten polymer from the cavity and delivering the molten polymer to an outlet orifice of the die outlet end. The fluid supply includes a channel that delivers a fluid to the die outlet end to thin fibers formed from the molten polymer flowing out of the die outlet end. The fluid temperature T2 provided by the fluid supply is different from the temperature T1 of the molten polymer within the cavity, and the melt-blowing system is configured to independently maintain the molten polymer within the cavity at the temperature T1 during operation of the melt-blowing system.

One or more aspects of the disclosure provides a nonwoven fabric comprising a single layer in which the single fabric layer comprises a plurality of different fibers in which each fiber type has desired functionality. In one aspect, a system for preparing a nonwoven fabric having a single fabric layer in which the single fabric layer comprises a plurality of different fiber types, is provided. The system includes a spin beam having a zoned distribution plate disposed upstream of a spinneret, the zoned distribution plate includes a plurality of distribution apertures arranged in zones, wherein each zone is configured and arranged to extrude a plurality of polymer streams that are of a different polymer type than polymer streams extruded by an adjacent zone to the spinneret to form a single layer having two or more types of fibers that are of a different type from each other.

The utility model relates to equipment for heating polymer-containing material flow. Specifically, an apparatus for heating a polymer-containing stream transferred from a polymerization reactor to a gas separation vessel, the apparatus comprising a polymerization reactor, a gas separation vessel, and a plurality of parallel heaters through which the polymer-containing stream can be transferred from the reactor to a single gas separation vessel, each heater comprises a transfer line for the flow and means for heating the transfer line, in which three parallel heaters, which are open between the polymerization reactor and the gas separation vessel, and a fourth heater, which is closed between the polymerization reactor and the gas separation vessel, are provided, and in which the third heater is closed between the polymerization reactor and the gas separation vessel. The ratio Do / Di of the outlet diameter Do to the inlet diameter Di of each transfer line is between 1.2 and 10.

The embodiment of the application relates to the technical field of heat plate, and provides a manufacturing method of a heat plate and the heat plate, which utilizes a forming die to mold a polymer fluid into a heat plate body with openings, utilizes elastic plugs to seal the openings to seal cavities, and performs vacuum extraction and liquid filling operations on the cavities by piercing the elastic plugs to obtain a complete heat plate; wherein the polymer fluid is formed by uniformly mixing a polymer matrix fluid and modified powder, and the flexibility of the heat plate body molded can be adjusted by regulating the mixing ratio of the modified powder in the polymer matrix fluid; in the manufacturing method of the heat plate provided by the application, the vacuum extraction operation and the liquid filling operation can be realized only by piercing the elastic plugs, and after the piercing operation of the extraction needle is completed, the elastic plugs can be elastically restored to extrude and seal the piercing holes of the plugs, so that the vacuum extraction process and the liquid filling process are more simple and reliable.

This disclosure describes meltblown methods, assemblies, and systems for polymer production. In one such implementation, a meltblown system provides improved uniform output and reduction of fiber size given certain polymer material and production rate. In certain meltblown implementations, the equipment may be ready and quickly swapped while provided in hot standby mode such that the maintenance down time is minimized. The disclosed meltblown equipment may include a polymer beam and air chamber and a die tip assembly. The die tip assembly, in certain embodiments, may quickly be attached onto or removed from the polymer beam and air chamber. In preferred embodiments, the meltblown system includes a single input (e.g., a specific type of polymer material). The meltblown system includes some tapered structures that facilitate polymer flow. The assembly mechanisms used in the meltblown system enables cleaning of the polymer distribution components with each use.

This invention discloses an online quality control method and system based on the rheological properties of raw polymers. Real-time flow information from different sections of the raw polymer melt processing line is acquired and converted into one or more rheological property curves at different times. These rheological property curves at different times are then filtered using feature engineering methods to obtain correlated rheological property curves. These correlated rheological property curves are input into a polymer property calculation device to obtain the predicted product quality value for the current time period. It is then determined whether the predicted product quality value falls within a threshold range. If it does, the current flow information of the raw polymer processing line is considered to meet the requirements; otherwise, it does not meet the requirements and adjustments to the current flow information are necessary. This invention employs online rheological detection technology combined with AI algorithms, resulting in improved efficiency and accuracy of online quality control technology.

A mixture can be used for modifying the rheology of polymeric substrates. The mixture contains a hydroxylamine ester and an isocyanate functionalized with a thio compound.

In a spinning machine having multiple spinning units, the aim is to simultaneously reduce material costs in the supply section and suppress increases in power consumption. [Solution] Each spinning unit 20 of the spinning apparatus 2 includes a heating box 21 to which a spinning pack 22 is attached, piping 241 through which molten polymer flows toward the spinning pack 22, a gear pump 25 subject to maintenance, a cooled section X located upstream of the gear pump 25 in the flow direction A, the cooled section X having a reduced flow rate of molten polymer flowing inside when cooled, a cooling section 31 in contact with the cooled section X, and a housing 29 housing the heating box 21. The cooling section 31 has an upper end 31a to which a supply section 32 having a supply passage for supplying air as a coolant can be attached and detached. Each spinning unit 20 is configured such that the supply passage is connected to the cooling space when the supply section 32 is attached to the upper end 31a. The upper end 31a does not protrude from the outer surface of the housing 29.

The present invention relates to a method for recovering a stream of purified PVC polymer, comprising: a) a dissolution step in which a plastic feedstock is contacted with a dissolution solvent; b) an extraction step by size exclusion in which fixed beds of size-exclusion solids are arranged in series, the crude polymer solution obtained in step a) is fed at injection point F, the eluate is fed at injection point S, the extract is withdrawn at withdrawal point E, and a raffinate comprising the purified polymer solution is withdrawn at withdrawal point R, the injection and withdrawal points shifting by one bed over time with a frequency determined by a predetermined changeover period; and c) a step in which the solvent and the polymer are separated to obtain a stream of purified PVC polymer. The present invention also relates to a device for the treatment of step b) and to a device for treating the recovery method.

TITLE: Process for the preparation of a composition in powder form comprising at least one solid organic peroxide The present invention relates to a process for the production of a powder composition comprising at least one solid organic peroxide having the advantages of having a reduced water content and being able to flow easily. The invention also relates to a powder composition which can be obtained from the process as defined below. The present invention further relates to the use of said powder composition as a polymerization initiator for acrylic resins or unsaturated polyester resins, preferably acrylic resins, or as a polymer modifier, for example as a crosslinking agent, grafting agent or polymer rheology modifier, preferably as a polymerization initiator for acrylic resins or unsaturated polyester resins.The invention further relates to the use of said powder composition for road marking, chemical anchoring, waterproofing and flooring applications, preferably road marking.

This invention relates to a laser-based detection-based method for controlling the eccentricity of cable insulation layers, aiming to solve the problem of difficult eccentricity control caused by the unstable flow of molten polymer. The core scheme involves embedding a micro-stress sensor array in the extruder head to simultaneously collect multiple process parameters such as stress, temperature, pressure, and tension, integrating them into a multi-source raw dataset. A high spatiotemporal resolution dynamic stress field is reconstructed through spatiotemporal fusion, interpolation, and rheological correction. Furthermore, a physically meaningful three-dimensional stress fingerprint vector is extracted, and a response spectrum between stress and eccentricity evolution is constructed by combining historical calibration data, enabling real-time prediction of eccentricity trends. Based on the prediction results, servo-driven compensation adjustment is implemented in the extruder head to achieve dynamic feedforward control of concentricity, and model fine-tuning is performed based on laser detection feedback. This method improves the uniformity and process adaptability of insulation layer forming, and reduces the risk of eccentricity defects caused by fluctuations in operating conditions.

This invention provides a water-based drilling fluid for solidifying the wellbore in deep oil and gas wells at depths of 10,000 meters, along with its preparation method and application, belonging to the field of drilling fluid technology. The water-based drilling fluid for solidifying the wellbore in deep oil and gas wells at 10,000 meters comprises the following raw materials in parts by weight: 100 parts water, 1-5 parts modified clay shearing agent, 2-4 parts hydrophobic associating polymer flow modifier, 3-8 parts plugging agent, 2-5 parts hyperbranched polymer filtration reducer, and 1-3 parts cemented plugging wall-solidifying agent. This invention also provides a method for preparing the above-mentioned drilling fluid. In this invention, the flow modifier, plugging agent, filtration reducer, and wall-solidifying agent work synergistically to enable the drilling fluid to maintain good rheological, filtration, plugging, and inhibition properties for a long time under 240°C and saturated salt conditions, achieving a strong wall-solidifying effect. This effectively maintains the stability of the wellbore in deep oil and gas wells at 10,000 meters, preventing well collapse, lost circulation, blowouts, and other drilling complications, and can be used in drilling deep oil and gas wells at 10,000 meters.

The invention discloses a high-temperature-resistant dielectric film as well as a preparation method and application thereof, and belongs to the technical field of dielectric films. The preparation method comprises the following steps: dissolving 4, 4 '-diaminodiphenyl sulfone and 3, 3'-diaminodiphenyl sulfone in N, N '-dimethylacetamide under the protection of nitrogen, cooling to 0-10 DEG C after the diaminodiphenyl sulfone is completely dissolved, and then adding paraphthaloyl chloride for polymerization under the protection of nitrogen; after the polymerization is completed, ammonia gas is introduced to neutralize a byproduct hydrogen chloride generated by the reaction, and after the neutralization is completed, insoluble ammonium chloride generated by the neutralization reaction is removed through filtration to obtain a polysulfonamide polymer; and casting the polysulfonamide polymer to form the membrane. Polysulfonamide has intermolecular hydrogen bonds which polyimide and polyetherimide do not have, so that the film prepared from polysulfonamide is more stable under the action of an electric field and has higher breakdown strength, and the discharge energy density of the film is obviously superior to that of a PI film and a PEI film under the same charge-discharge efficiency; the material has a wide application prospect in the fields of dielectric energy storage capacitors and electrical insulation.

The invention relates to the field of preparation of polyolefin materials, and discloses a polyolefin purification method which comprises the following steps: S1, spraying and atomizing polyolefin reaction liquid to obtain atomized polyolefin reaction liquid drops; s2, performing primary devolatilization on the atomized liquid drops of the polyolefin reaction liquid through hot air flow to obtain filamentous or reticular solid polyolefin; s3, carrying out deliming on the filamentous or netted solid polyolefin; and S4, carrying out secondary devolatilization on the delimed material. According to the method, the polymer fluid can be effectively prepared into a filamentous or net-shaped solid polymer with the large specific surface area ranging from nanometer to micrometer, the polymer can make efficient contact with a detergent, the diffusion mass transfer effect is improved, and the washing and deliming effect is effectively improved.

There is provided a spinneret (1) for a multi-row coaxial spunbond and / or melt-blown type plant developing along a main axis (1a) and a main plane (1b), defining a vertical axis (1c) perpendicular to the main axis and plane (1a, 1b) and comprising a first end (10) adapted to interface with a polymeric fluid distributor of a multi-row coaxial spunbond and / or melt-blown type plant; a second end (11) arranged at a side of the spinneret (1) opposite the first end (10) with respect to the main plane (1a) at which the polymer fluid exits from the spinneret (1) in the form of polymer filaments; and a plurality of acceleration conduits (2) extending at least from the first end (10) to the second end (11) each along its own dispensing axis (2a), each adapted to dispense a respective polymer filament along the dispensing axis (2a) and distributed both along a distribution axis (2b) transverse to the main axis (1a) and the vertical axis (1c) so as to create a first row (2′), and parallel to the main axis (1a) so as to make at least a second row (2″) offset with respect to the first row (2′) along the main axis (1a); and wherein at least one of the dispensing axes (2a) of the acceleration conduits (2) of the first row (2′) defines a first angle of inclination (α′) with respect to the main plane (1b) other than 90° and at least one of the dispensing axes (2a) of the acceleration conduits (2) of the second row (2′) defines a second angle of inclination (α′) with respect to the main plane (1b) different from the first angle of inclination (α′).

The utility model discloses a variable diameter extrusion die core, which relates to the technical field of cable production, and specifically comprises a die core body, the die core body comprises a fixing part and a positioning part, one end of the fixing part far away from the positioning part is matched with an inner conical surface of an extrusion die original die core, and an inner cavity of the positioning part is matched with a cable conductor or a cable core. And the outer diameter of the positioning part is smaller than the pipe diameter of the original mold core of the extrusion mold. The variable-diameter extrusion mold core is matched with a mold core of an existing extrusion mold, can be directly clamped with the mold core of the existing extrusion mold, realizes positioning of a small-specification cable, avoids disassembly and assembly of the existing extrusion mold, improves the use convenience of the extrusion mold, can omit the operation of waiting for temperature rise, can directly produce the cable, improves the production efficiency of the multi-specification cable, and is suitable for large-scale production. And old glue caused by the change of the temperature of the polymer runner in the extrusion die can be avoided, so that the production cost is saved, and the cable production quality is guaranteed.

To provide a spinneret of a multi-row coaxial spun-bond and / or melt-blown type production facility adapted to enable distribution of a polymerized fluid in an output from the production facility in an extrusion polymerization filament form to obtain a non-woven fabric.SOLUTION: In a spinneret (1) of the multi-row coaxial spun-bond and / or melt-blown type production facility, at least one of a plurality of dispensation shafts (2a) of an acceleration tube defines a first angle of inclination (α') other than 90° to a main plane (1b), and at least one of the dispensation shafts (2a) of an acceleration tube (2) of a second lateral array (2'') defines a second angle of inclination (α'') different from the first angle of inclination (α') to the main plane (1b).SELECTED DRAWING: Figure 1

The meltblown system includes a die including a die inlet end that receives molten polymer from a polymer source, a cavity downstream from the die inlet end through which the molten polymer flows, and a die outlet end that receives the molten polymer from the cavity and delivers it to an outlet orifice at the die outlet end. A fluid supply includes channels for delivering fluid to the die outlet end to draw fibers formed from the molten polymer emerging from the die outlet end. The fluid supply supplies fluid at a temperature T2 that is different from a temperature T1 of the molten polymer in the cavity, and the meltblown system is configured to independently maintain the molten polymer in the cavity at temperature T1 during operation.

A printhead for three-dimensional printing features a mixing cavity and a mixing rotor with a mixing portion disposed within the mixing cavity. The mixing rotor is operated by a motor to mix at least one polymeric stream received in the mixing cavity. The system further includes a control valve having a seat and a valve stem. The valve stem is mounted such that at least a portion thereof traverses through a void made along the mixing rotor. A pressure-generating mechanism advances the polymeric stream in a downstream direction into the mixing cavity and further through the flow passage of the control valve toward the outlet of the printhead. Linear movement or rotation of the valve stem is used to control the form of the flow passage and, therefore, the flow of the polymeric stream through the printhead.

The present invention relates to a screening assembly comprising a separation device connected to a conduit for an effluent stream comprising a mixture of polymers and hydrocarbons, wherein the separation device is configured to separate the effluent stream into a polymer-rich stream and a polymer-lean vapor stream, wherein the first separation device comprises: an inlet; a first outlet for extracting the polymer-rich stream and a second outlet for extracting the polymer-lean vapor stream; a screening device connected to the separation device via a conduit for the polymer-lean vapor stream, wherein the screening device comprises a first inlet connected to the conduit for the polymer-lean vapor stream, a first outlet for extracting a clean vapor stream, a second outlet for extracting a polymer-containing condensate vapor stream, and at least one second inlet for introducing the condensate vapor stream.

The invention belongs to the technical field of olefin polymerization, and particularly relates to a method for continuous polymerization of ethylene and alpha-olefin. According to the method, the feeding temperature of the raw materials is 10-30 DEG C; the temperature of the polymerization reaction is 120-150 DEG C; the ratio of the raw material heat removal amount to the polymerization reaction heat exchange amount is Q, and Q is more than 50% and less than 85%; ; xc is the mass ratio of the structural unit from the alpha-olefin monomer in the polymer, Tr is the temperature value of the polymerization reaction by taking DEG C as the unit, Ta is the feeding temperature value of the raw material by taking DEG C as the unit, and W is the reaction solid content; w = yield of polymer / total feed quantity * 100%; the total feed quantity comprises the feed quantity of the raw material, the main catalyst and the cocatalyst; the method is low in energy consumption and high in polymerization activity, the obtained polymer is good in fluidity, equipment cannot be blocked, long-term operation of the equipment is facilitated, and the cost is reduced.

A mixture can be used for modifying the rheology of polymeric substrates. The mixture contains a hydroxylamine ester and an isocyanate functionalized with a thio compound.