210 results about "Polymer flow" patented technology

An apparatus for forming an object by an additive process, commonly referred to as 3-D printing, is provided. The apparatus includes a filament comprising a series of irregularities along the length of the filament, a nozzle depositing a layer of melted material onto a surface and a feeder feeding the filament to the nozzle. A heating element melts the filament and a controller controls the position of the nozzle in a plane to control the configuration of the layer of melted material deposited by the nozzle. Additionally, a method for forming polymer filament used in 3-D printing devices is also provided. The method includes the steps of melting a polymer, selecting an extrusion characteristic calculated to induce a polymer flow instability and extruding the melted polymer using the selected extrusion characteristic to produce an extrusion having distortions created by the polymer flow instability.

There is described a method of producing fibre reinforced laminated structures by layering a number of dry fibre reinforcement layers by placing them on top of each other in a mould, infusing a curable viscous or liquid polymer into the mould after the fibre reinforcement layers have been layered in the mould and curing the polymer, wherein a flow enhancing layer for enhancing the polymer flow during infusion of the polymer is placed between two fibre reinforcement layers when layering the number of dry fibre reinforcement layers and wherein a pre-cured solid layer is used as the flow enhancing layer.

The invention provides a black ink for ink-jet printers, which comprises 10-30% of carbon black, 0.1-1.25% of amphiprotic polymerized substance, 0.1-1.5% of levelling agent, 10-30% of wetting agent, 0.05%-0.5% of defoaming agent and deionized water, 20-33% of carbon black dispersion liquid, 0.05-2% of surface active agent, 5-50% of humectant, 0.1-2% of pH regulator, 0.5-2% of drier, 0.1-0.5% of preservative agent, 0.1-0.5% of mold preventive, 0.01-0.5% of chelating agent, 0.1-2% of resin and deionized water.

The invention provides an epoxy end group hyperbranched poly (amide-ester) and a preparation method. The preparation method comprises the following steps: taking dihydroxy amide ester as a chain propagation monomer, adding multifunctionalmolecule polylol as a core, reacting in the presence of a catalyst and inert gases to obtain hydroxyl end group amido hyperbranched poly (amide-ester); and then enabling a hydroxyl end group to react with epoxy chloropropane to generate the epoxy end group hyperbranched poly (amide-ester). The epoxy end group hyperbranched poly (amide-ester) is in an approximately sphere symmetrical three-dimensional structure with high functionality, has the relatively molecular weight as high as 10,000-20,000 and the molecular weight distribution coefficient as much as 1.02-1.35, can be used as a rheologicalproperty regulator or polymer rheological processing modifier, can improve the compatibility when being blended with a polymer containing an epoxy group, improvethe tensile strength by 40 percent compared with a pure polymer, improve the breaking strength by 60 percent compared with the pure polymer and achieve the functions of toughening and strengthening.

Modular plastic floor tiles have elongate drainage vents formed to extend from the general upper surfaces of the tiles to general lower surfaces thereof. In a two-shot injection molded embodiment, the vents are laterally spaced from locations of overmolded features, and may be disposed within channels defined by downwardly depending support ribs. In one embodiment, groups of elongate vents are disposed around respective fill points in radiant fashion, so as to minimize the impedance to polymer flow within the injection mold. The vents may be radiussed at the tile's upper surface to enhance their fluid collecting capability.

A modular plastic floor tile has a body of a first polymer compound and at least one upper feature overmolded onto an upper surface of the body from a second polymer compound which is injected from a gate adjacent the lower surface of the body. At least one through-hole communicates the gate to the upper feature. At least one vent hole, spaced from the through-hole, communicates the upper feature to the lower surface of the body. The vent hole allows any gas in the polymer flow path to be displaced from the upper feature, thereby preventing or minimizing defects that can affect adhesion and appearance.

A filtration apparatus for use in polymer processing includes a housing having an internal bore for directing polymer flow and a channel oriented transversely to the bore. A slide plate for supporting filters is movable through the channel and across the bore. An annular upstream seal ring sealably contacts the slide plate. A surface of the upstream seal ring facing the upstream direction is angled with respect to the bore. A plurality of ring segments are arranged to form an annular segmented ring. The segmented ring presents a tapered ring surface that is generally complimentarily angled relative to the angled surface of the upstream seal ring. Pressurized polymer flowing through the bore imparts radially forces on the ring segments, causing the ring segments to impart axial forces on the upstream seal ring to enhance the seal interface between the upstream seal ring and the slide plate.

A device for making a profiled insulation having an extrusion die with an extrusion tip and a polymer chamber surrounding the extrusion tip. The polymer chamber has at least one air chamber therein. The air chamber is held in place and coupled to the outside of the extrusion die by a vertical fin extending outwards from the extrusion tip. When molten polymer flows through the polymer chamber around the air chamber, an opening is introduced into the polymer such that the profiled insulation is formed as the polymer exits the extrusion die, having a longitudinal cavity therein corresponding to the location of the opening formed by the at least one air chamber.

The invention relates to a polymer mobility control agent suitable for a high-temperature and high-salinity harsh reservoir and a preparation method of the polymer mobility control agent, and the polymer mobility control agent is mainly used for solving the problems that the polymer in the prior art is poor in heat and salt resistance and long-term stability, and cannot meet the requirements of tertiary oil recovery. In order to better solve the problems, the technical scheme adopted by the invention is as follows: an amphoteric hydrophobic association polymer is prepared from the following raw materials in parts by weight: 5-99.9 parts of a non-ionic water-soluble monomer, 0-50 parts of an anionic monomer or/and cationic monomer, 0.1-10 parts of a hydrophobic monomer with surface activity, 0-20 parts of a viscosity stabilizer and 0-20 parts of a surfactant. The preparation method can be applied to industrial production and application of the polymer mobility control agent for the high-temperature and high-salinity harsh reservoir.

A polymer extrusion head for forming continuous shapes having one or more lumens therein. The head includes an extrusion mandrel and die. At least one lumen pipe is disposed radially through a port in the die to intersect the polymer flow in the annular region between the tip and the die. The lumen pipe is a welded assembly having a 90° turn formed as a mitered joint with zero bend radius. The lumen pipe is held in a pin vise engaged in the die such that position of the lumen pipe may be readily adjusted. Axial and radial positions are established during assembly by means of a gauge block. A plurality of lumen pipes may be accommodated for a plurality of lumens by a manifold distribution system including individual lumen pipe assemblies.

Provided for preparing thermoplastic polymer blends is (1) an apparatus comprising a grinder, a mixer, at least one material transfer device, a weigh scale, means for addition of additives to the mixer, a storage vessel, a processing device and means for feeding polymer to the processing device; and (2) a process comprising mixing a known amount of a first material with a desired amount of at least one additive based on a predetermined weight ratio of additive to first material to form individual batches of pre-mix, storing the pre-mix batches in a storage vessel, continuously feeding the pre-mix from the storage vessel to a processing device, adding a polymer stream to the processing device at a rate based on the first material feed rate to the processing device, optionally adding at least one vulcanizing agent stream to the processing device at a rate based on the polymer stream feed rate to the processing device and melt mixing all materials in the processing device to form a thermoplastic polymer blend.

The invention relates to a preparation method for a polymer base nanometer composite material with highly oriented nanoparticles in the polymer matrix, and belongs to the technical field of polymer materials. The preparation method comprises that during a foaming process of a polymer nanometer composite material formed by carrying out melt co-mixing on a polymer and nanoparticles, external force is applied to make the foam hole in the material grow along the uniaxial direction in an oriented growth manner, and the polymer flows under the double induction of the external force and the foam hole growth to achieve the high orientation of the nanoparticles so as to obtain the polymer base nanometer composite material with the highly oriented nanoparticles in the polymer matrix. The method has advantages of simple operation, mild condition, high orientation degree of the nanoparticles in the prepared polymer nanometer composite material, and the like.

The invention relates to an oil-displacement composition with improved injectivity, and a preparation method and application thereof. The main objective of the invention is to overcome the problems of poor injectivity at zones near a well on site due to proneness to obstruction at pore throats of strata caused by strong adsorption effect of hydrophobic associated polymers on the surface of sandstone. The oil-displacement composition with improved injectivity comprises, by weight, 0.01 to 1 part of an anti-adsorption agent, 0.3 to 3 parts of a hydrophobic associated polymer and 96 to 99.69 parts of water, wherein the anti-adsorption agent is at least one or a mixture of two or more selected from a group consisting of nonionic surfactants and anionic surfactants. The oil-displacement composition provided by the invention perfectly overcome the above-mentioned problem and can be used for on-site injection of a polymer fluidity control agent into a high-temperature high-salt severe oil reservoir for oil displacement.

A gel reduction device 1 of the present invention includes a gel reduction mechanism 8 provided in a polymer flow duct 5 in which a polymer kneaded compound flows and adapted to reduce gel present in the polymer kneaded compound. The gel reduction mechanism 8 includes at least one or more squeezing flow paths 10 having a flow path cross-sectional area smaller than the polymer flow duct 5, and a squeeze ratio S1/S2 of the squeezing flow paths 10 is set to be 25 to 180 so as to be able to generate an extensional flow in the kneaded compound flowing in the squeezing flow paths 10.

The invention discloses an oxidizability and reducibility conducting polymer flow anode with used for a flow battery. An oxidizability and reducibility conducting polymer or a conducting polymer and an inorganic substance composite material are dispersed in electrolyte solution to form electrolyte of the flow battery, the electrolyte and a three-dimensional mesh current-collection body commonly constitute an emulsus flow electroactive polymer anode, and anode flow passes an anode chamber in a flowing form in the charging and discharging processes and is used for forming a flow battery system. As the dimension of the conducting polymer and the dimension of the inorganic substance composite material of the conducting polymer are large, the battery can adopt a common porous diaphragm; in addition, the corrosion of a medium system of the electrolyte of the battery used for an electroactive material to a solid current collector is small, and therefore, the environmental pollution is small in the production and using processes; the conducting polymer is rich in source, so as to be prepared on a large scale by an organic synthesis method; and the cost of the flow battery can be greatly lowered.

The present invention is directed to a process for producing a fluid containing oil and water from an oil-bearing formation and separating an oil phase and an aqueous phase from the produced fluid. An aqueous polymer mixture is formed by mixing polymer in water having a total dissolved solids content of from 200 ppm to 15,000 ppm. The aqueous polymer mixture is injected into an oil-bearing formation, and, after injecting the aqueous polymer mixture into the formation, a fluid is produced from the oil-bearing formation containing an oil phase and an aqueous polymer-containing phase. Brine is mixed with the produced fluid to enhance separation of the oil phase from the aqueous polymer phase.

A flat and nearly mechanically isotropic polymer film or sheet, or a tube, can be formed by laminating two or more films, preferably by coextrusion of a liquid crystal polymer film and a thermoplastic polymer film. A liquid crystal polymer layer may be combined with one or more thermoplastic polymer layer in various arrangements. The liquid crystal, and possibly the thermoplastic as well, may have a controlled molecular orientation. The film may be formed by passing a polymer through a set of two or three tubular rotors which are concentric and have facing surfaces which define inner and outer annular polymer flow channels.

An improved process for extruding plastic optical fiber without the need to prepare a preform is provided. Specifically, it was discovered that conventional extrusion techniques, e.g., screw extruders, tended to introduce an undesirable amount of particulate contaminants which increased the loss of the drawn fiber. To overcome this problem, the invention substantially reduces the number of mechanical interactions that contribute to such contamination. The process of the invention does so by using fluid pressure, instead of, e.g., screw extruders, to induce polymer flow. The process also controls the flow characteristics of the polymer, or halts the flow altogether, without mechanical controls. Specifically, the temperature of the sections through which the polymer flows is controllably adjusted, such that it is possible to bring the polymer to a desired flow rate or even to a solid state to provide a plug.

A meltspinning apparatus that provides for uniform distribution of a flow of a melt-processable thermoplastic polymer in a machine direction of the meltspinning apparatus. The meltspinning apparatus includes a spin pack having a plurality of side-by-side coathanger-shaped distribution chambers. Each of the distribution chambers uniformly distributes the polymer flow in the machine direction so that the molten polymer has a substantially uniform residence time in the chamber during distribution.

The invention discloses a preparation method of polyvinylidene fluoride with a one-dimensional nanowire array structure. The preparation method is specifically implemented according to the following steps of: 1. preparation of a metal electrode layer; 2. preparation of a polymer solution; 3. spin coating of a polymer layer; 4. preparation of a polymer precast structure through a metal mould; and 5. stretching the polymer precast structure in an electric field to form a nanowire array. The polyvinylidene fluoride with the one-dimensional nanowire array structure is directly prepared on a substrate so as to avoid the problem of inconvenience in transferring, and the molten polymer rheological stretching is driven by adopting the electric field in a preparation process, so that a material obtains good piezoelectric properties in a structure preparation process. The preparation method can be used for preparing energy harvesters and sensors, and solving the problems of inconvenience in transferring and poor piezoelectric properties caused by directly preparing the PVDF (Polyvinylidene Fluoride) nanowire array with the piezoelectric properties on the working substrate in the prior art.