45 results about "Polymer flow" patented technology

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).

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.

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.

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.

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.

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 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.

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.

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.

A multi-row coaxial melt-blown type plant (1) is provided, defining a dispensing direction (1c) along which a polymeric fluid is dispensed to form polymeric filaments and comprising a box (2) including one or more first ducts (20) configured to convey the polymeric fluid parallel to the dispensing direction (1c) and at least one second duct (21) configured to convey air or gas; a spinneret (3) integral to the box (2) and including a plurality of acceleration ducts (30) extending parallel to the dispensing direction (1c) comprising tubes (10) in fluid passage connection with the one or more first ducts (20) and configured to distribute the polymeric fluid, first holes (31) extending parallel to the dispensing direction (2a), centred and spaced with respect to the acceleration ducts (30) along the dispensing direction (1c) and configured to accommodate each part of a respective tube (10), second holes (32) extending parallel to the dispensing direction (1c) and adapted to allow the passage of air or gas, and a slit (33) extending transversely to the dispensing direction (1c) between the acceleration ducts (30) and the first holes (31) in fluid passage connection with the second holes (32), wherein at least part of the support (2) is in one piece with the spinneret (3) such that the slit (33) is in fluid passage connection with the second duct (21) and configured to convey the air or gas from the second duct (21) to at least the second holes (32).

The present invention relates to a process for recovering a purified PVC polymer stream from a PVC-based plastic feed comprising one or more PVC polymers and at least two families of additives, employing a two-phase solvent system comprising two immiscible liquid phases A and B, said process comprising: a) a dissolution step comprising contacting said plastic feed with a dissolution liquid consisting of phase A, to obtain at least one crude polymer solution (1); b) a liquid-liquid extraction step, in at least one zone, of the crude polymer solution (1), in the presence of a single extraction liquid (4) consisting of phase B to obtain a purified polymer solution (3) and at least one final additive stream (2) comprising said at least two families of additives;c) a polymer-solvent separation step, to separate the purified polymer solution into a stream of purified PVC polymer(s) and at least a solvent fraction comprising phase A. Figure 1 to be published;

The invention relates to a cyclic polymer processing method comprising an inline viscosity measurement method for determining a viscosity measurement value of a fluid polymer stream. The fluid polymer stream flows through a measuring section arranged in a closed channel, in which at least one static mixer containing a built-in element is arranged, whereby an inlet pressure upstream of the built-in element and an outlet pressure at an outlet end are measured. A computer unit determines a pressure difference between the inlet pressure and the outlet pressure. The maximum measured pressure difference during a measurement time per cycle is at least 5 bar.

The utility model discloses a polymer vacuum devolatilization device, which belongs to the technical field of devolatilization devices and comprises a feed pipe, the bottom of the feed pipe is communicated with a heating devolatilization area, the bottom of the heating devolatilization area is communicated with a preheater, the bottom of the preheater is communicated with a vacuum devolatilization tank, and one side of the vacuum devolatilization tank is communicated with a recovery mechanism. And the bottom of the vacuum devolatilization tank is communicated with a collection box. The feeding hole is used for introducing a polymer material to be devolatilized into the heating devolatilization area, the polymer flows through the heating tube nest in the heating devolatilization area and is devolatilized while being heated so as to reach the temperature required by devolatilization, and the polymer is rapidly and uniformly heated to the temperature close to the devolatilization temperature through the preheater, so that the risk of local overheating for damaging molecular chains is reduced, and the devolatilization effect is improved. A negative pressure environment is established through the vacuum devolatilization tank, volatile components in the polymer are extracted, and the volatile components are cooled and discharged through the condenser, so that the boiling point of the volatile components can be reduced, the energy consumption can be reduced, and the devolatilization efficiency can be improved.

The invention belongs to the technical field of high polymer material modification engineering, polymer rheological design and modern advanced plastic processing and forming, and particularly relates to a high-temperature-resistant polypropylene composite material for rapid thermal cycle injection molding. The invention aims to solve the problems of mechanical property degradation, contradiction between material heat resistance and processing fluidity, surface floating fiber, roughness and the like of the polypropylene composite material. According to the composite material disclosed by the invention, high-crystallinity co-polypropylene is taken as a continuous phase matrix, modified wollastonite whiskers and microfibrillated elastomers are introduced, and a hybrid enhanced network is constructed in the matrix. The preparation method comprises the following steps: by taking tetraethoxysilane as a precursor, uniformly coating a silicon dioxide buffer shell layer on the surface of a micro-nano aluminum oxide particle to prepare an aluminum oxide-silicon dioxide core-shell structure heat-conducting particle; hydrogenated petroleum resin is introduced, and the extremely low viscosity lubricating effect of the hydrogenated petroleum resin in a molten state and the high modulus steric hindrance effect of the hydrogenated petroleum resin in a glassy state are utilized, so that the processing fluidity and the macroscopic heat distortion temperature of the material are synergistically improved.

The application relates to a polymer rheological impedance characteristic representation method for oil displacement based on an equivalent circuit method, which comprises the following steps: obtaining total rheological impedance and phase angles of the polymer for oil displacement under different shearing rates, constructing and dividing polymer rheological impedance characteristic representation data sets under shearing effects; constructing a series equivalent model representing the rheological impedance characteristics of the polymer for oil displacement; constructing a parallel equivalent model representing the rheological impedance characteristics of the polymer for oil displacement; constructing a composite equivalent model representing the rheological impedance characteristics of the polymer for oil displacement; introducing a grey wolf algorithm, preferably selecting applicable limits of the equivalent model under different shearing rates based on the data sets representing the rheological impedance characteristics of the polymer for oil displacement under shearing effects, and realizing quantitative representation of the rheological impedance characteristics of the polymer for oil displacement. The application quantifies the rheological impedance of the polymer for oil displacement under shearing effects, guarantees quantitative and scientific representation of the rheological impedance characteristics in the polymer rheological performance evaluation process.

The invention relates to a polymer flow hardening repairing method and device for pipeline defects and cracks. According to the method, crack conditions are positioned and determined; determining repair requirements according to pipeline crack conditions; cleaning the periphery of the crack surface, drilling a crack arrest hole in the end part of the crack, and activating and repairing an interface; injecting the nano-reinforced prepolymer composition into the crack area through a micro-injection head, applying a local vacuum negative pressure environment, and driving the nano-reinforced prepolymer composition to fill crack branches and pores; according to repair requirements, an alternating magnetic field is introduced by an electromagnetic induction coil, and / or near-infrared light with set wavelength and light intensity is introduced by an optical fiber to treat a repair area, so that dual-mode excitation particles are excited to generate a local heat effect, and a latent dialdehyde crosslinking catalyst is activated to initiate a reaction type thermoplastic prepolymer matrix polymerization reaction; forming a gradient hardening structure from the deep part of the crack to the outer surface; the dual-mode curing of the nano reinforced prepolymer composition is supported, a gradient hardening structure from the deep position of a crack to the outer surface is formed, and the structural performance is good.

The invention relates to a method for controlling a melt extrusion process of a polymer composition using a melt extruder comprising a die, the method involving * determining in a reference extrusion device comprising a die of known geometry, during a reference polymer extrusion run using the polymer composition, the fraction of the inner surface of the die to which particles adhere of a given polymer processing aid that is dosed to the reference extrusion device, under known polymer flow parameters, under steady state operation; * determining the surface quality of the polymer article that is obtained from the reference polymer extrusion run; * determining a relation between a property of the polymer article and / or a processing property, and the polymer processing aid efficiency; and * determining the quantity of the polymer processing aid that is to be dosed to the melt extrusion process using the determined relation. Such method allows for providing a flexible means for operating an extrusion process, enabling real-time control of the occurrence of melt fracture phenomena, including flow instabilities.

Described herein are oral care compositions comprising: an oxidizing agent comprising potassium peroxymonosulfonate, a carrier comprising a polymer fluid, an adhesive, and a flavouring agent; wherein the oxidizing agent is substantially free of a peroxide source, optionally free of a peroxide source.

The application discloses a kind of polymer rheological property prediction method and system based on global optimization, to solve the problems that traditional rheological data exists apparent physical deviation, engineering constitutive parameter step fitting is easy to fall into local optimum and microstructure feature is difficult to quantify.The method first obtains the apparent data of polymer in multiple temperature zones steady shearing and dynamic oscillation;Then, based on Rabinowitsch equation, polynomial differential correction is carried out, and the deviation of pipe wall velocity distribution is eliminated to extract the real physical viscosity;Subsequently, a Cross-WLF three-dimensional space model containing temperature and shear rate is constructed, and Levenberg-Marquardt algorithm is used to perform global nonlinear iterative optimization, and the kinetic and thermodynamic constants are extracted in one step;At the same time, dynamic modulus data is introduced to perform Cox-Merz rule self-consistency verification, and a multi-dimensional diagnostic atlas matrix is constructed.The application breaks the limitation of traditional single-temperature zone fitting, and realizes the automatic extraction of high-precision mold flow simulation parameters and the accurate diagnosis of material microphase separation.

This invention discloses a damping polymer fluid gel intelligent cushioning packaging and item drop monitoring system, comprising a shell, a damping sensor, a signal acquisition and processing module, and an intelligent receiving terminal. The damping sensor, a polymer fluid gel with a core-shell structure, is attached to the inner wall of the shell. When subjected to impact, the sensor achieves cushioning protection through the coordinated energy dissipation of the hard shell through plastic deformation and the viscoelastic flow of the soft core, while simultaneously sensing the impact event by generating a resistance change in response to compression deformation. The signal acquisition and processing module, fixed to the outer wall of the shell, acquires the resistance change signal and identifies the impact event, then wirelessly transmits it to the intelligent receiving terminal for real-time display and alarm. This invention features a simple manufacturing process and structure, controllable cost, and combines efficient cushioning protection with visual monitoring of drop conditions, providing an innovative solution for the safety monitoring of items during logistics transportation, and possesses good practical value and promising prospects for widespread application.

This invention discloses a downhole injection device with adjustable polymer flow rate and its usage method, relating to the field of downhole tool technology. The downhole injection device includes a shaft, a polymer injection chamber, a damping chamber, and a shaft rotation speed control device. The shaft passes through the polymer injection chamber and the damping chamber. Polymer injection blades are disposed within the drive chamber of the shaft, and damping blades are disposed within the damping chamber. The shaft rotation speed control device can control the volume of the damping chamber. This invention can improve the downhole flow rate adjustment effect of high-viscosity polymer flooding.

The invention relates to an implantable ventricular epitaxy co-pulsation cycle support system with a sutureless flow guide tube assembly, which is arranged to be connected with a ventricle of a heart. Comprising a valveless displacement type blood pump, a deformable polymer flow guide tube, a pair of male buckle and female buckle, a coupler, a driving catheter assembly and a conic driver. Forward and reverse flow delivery between the blood pump and the ventricle is accomplished using the catheter of the invention, which is anastomotic to the ventricle in a sutureless manner. When circulation support is provided, the systolic driver will eject blood from the blood pump during ventricular systole and fill blood into the blood pump during ventricular diastole.