16 results about "Capillary rheometer" patented technology

The present disclosure relates to a polyamide composition, a polyamide self-crimping fiber, and a method for preparing the polyamide self-crimping fiber. The polyamide composition comprises a first component comprising polyamide 56 and a second component comprising polyamide X, wherein the polyamide X comprises polyamide 510 and / or polyamide 6; a mass ratio of the first component to the second component is (40～60) : (40～60); and a difference between the shear viscosity V56 of the first component and the shear viscosity VX of the second component satisfies: V56 -VX=15～70 Pa·s; wherein, V56 and VX are the shear viscosities of the first component and the second component, respectively, measured by a capillary rheometer at a testing temperature of 270℃ and a shear rate of 10000 s-1. The polyamide composition according to an embodiment of the present disclosure can be used to prepare polyamide self-crimping fibers, which can result in fibers with good mechanical properties and excellent elasticity.

The present invention relates to a thermoplastic polymer composition comprising a matrix polymer (A) and a polymer processing aid (B), wherein (δ polymer (B) - δ matrix polymer (A)) >= 2.0 (J1 / 2.cm-3 / 2), preferably > 3.0 (J1 / 2.cm-3 / 2) (where δ is a solubility parameter calculated according to the Fedor method), and the melt viscosity ratio of polymer (B) to matrix polymer (A) is less than 0.30, preferably less than 0.20 (where the melt viscosity is measured at 210°C and 100s). -1 This relates to thermoplastic polymer compositions (measured by capillary rheometry at shear rates).

The invention relates to a polyamide composition, a polyamide self-crimping fiber and a preparation method thereof, the composition comprises a first component and a second component, the first component comprises polyamide 56, and the second component comprises polyamide 6; the mass ratio of the first component to the second component is (45-55): (45-55); the difference value between the shear viscosity V56 of the first component and the shear viscosity V6 of the second component meets the following relationship: V56 and V6 are equal to 15-70 Pa.s; wherein V56 and V6 are respectively shear viscosities, measured by a capillary rheometer, of the first component and the second component under the conditions that the temperature is 270 DEG C and the shear speed is 10000 s <-1 >. The polyamide composition provided by the embodiment of the invention is used for preparing polyamide self-crimped fibers, and the prepared fibers can have good mechanical properties and excellent elasticity.

The invention discloses a color master batch dispersibility detection method based on a rheology principle. The method comprises the following steps: S1, preparing a polymer melt test sample containing a color master batch to be detected and a standard sample with good dispersibility; s2, using a capillary rheometer to obtain the total pressure drop when the sample flows through the capillary; s3, determining inlet pressure drop of the to-be-detected sample and the standard sample; s4, on the basis of the difference between the inlet pressure drop of the to-be-tested sample and the inlet pressure drop of the standard sample, calculating a dispersity index for quantitatively evaluating the dispersion degree of the to-be-tested color master batch. According to the invention, the color master batch dispersibility is improved from qualitative description to quantitative evaluation, and the reproducibility, comparability and high sensitivity of the detection method are ensured.

The present invention addresses the problem of obtaining a polyphenylene sulfide resin composition which contains a large amount of a thermoplastic amorphous resin and achieves adequate fluidity and recycled material content at the same time. The present invention relates to a polyphenylene sulfide resin composition which is obtained by adding, if the polyphenylene sulfide resin composition is taken as 100 mass%, (A) 85-30 mass% of a polyphenylene sulfide resin and (B) 15-70 mass% of a thermoplastic amorphous resin, wherein: the thermoplastic amorphous resin (B) is a recycled thermoplastic amorphous resin; and the polyphenylene sulfide resin composition has a melt viscosity (v) of 10-500 Pa∙s at a shear rate of 1,216 / s as measured under the condition of (orifice length L (mm)) / (orifice diameter D (mm)) = 10 after retaining the polyphenylene sulfide resin composition at 310°C for 5 minutes with use of a capillary rheometer.

1. The name of the design product: capillary rheometer (MLW-400D). 2. The use of the design product: instrument for measuring the rheological properties of high polymer materials. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

To provide metal powder for injection molding capable of producing an injection molded body having small shrinkage during sintering, and capable of producing a metal sinter with high form accuracy.SOLUTION: In a volume-based cumulative particle size distribution curve obtained by laser diffraction, when the cumulative value from the small-diameter side is 50%, the particle size D50 is 1.0 μm or more and less than 10.0 μm, the average circularity is 0.86 or more and 0.95 or less, and the molten viscosity measured using a capillary rheometer at a shear rate of 100 [s-1] and a temperature of 150°C is 120 [Pa s] (1200 [P]), when a preparation compound for evaluation is prepared by kneading with an organic binder to achieve these conditions, the metal powder for injection molding is characterized in that the powder packing density in the evaluation compound is 63 vol% or more and 75 vol% or less.SELECTED DRAWING: None

The utility model discloses a capillary rheometer which comprises a U-shaped frame body, and a connecting pipe is mounted at the bottom of the U-shaped frame body; the outer barrel is mounted in the connecting pipe; the heating pipe is positioned on the U-shaped frame body and is inserted into the outer cylinder body; the electric push rod is arranged on the U-shaped frame body, and the output end of the electric push rod is in transmission connection with a pressing plate; and the auxiliary mechanism is arranged at the top of the U-shaped frame body and used for enabling the electric push rod and the heating pipe to be directly separated from the U-shaped frame body. The auxiliary plate, the supporting frame, the base plate, the connecting column, the operating frame and the locking plate are matched with one another, the electric push rod and the heat conduction pipe are connected in series and supported by the auxiliary plate, the auxiliary plate is positioned through the supporting frame and the connecting column, and the locking plate is driven by the operating frame to limit the relative positions of the supporting frame and the connecting column; and therefore, the electric push rod, the pressing plate and the heating pipe can be uniformly and directly taken down from the U-shaped frame body, and uniform maintenance operation is facilitated.

Thereby, the polysulfone-based resin composition having high fluidity can simply be obtained at a low cost in a short time. The obtained polysulfone-based resin composition is particularly suitable for a polymer alloy with other thermoplastic resins or thermosetting resins.SOLUTION: The polysulfone-based resin composition comprises (A) a polysulfone-based resin, (B) a hydrophilic resin, and (C) a metal alkoxide. The method for producing the polysulfone-based polymer composition comprises bringing (A1) the polysulfone-based polymer, (B1) the hydrophilic polymer and (C) the metallic alkoxide into contact with each other in the absence of a non-solvent. Further, the polysulfone-based resin composition comprises (A2) a polysulfone-based resin and (B2) a hydrophilic resin, and has a melt viscosity of 1-500 Pa·s measured by using a capillary rheometer under the condition of a shear rate of 1216 / s at a temperature of (A2) the polysulfone-based resin + 5 minutes at a temperature of (B2) the hydrophilic resin + 50 °C.SELECTED DRAWING: None

The present invention provides a high viscosity composition of a powder particle of a tetrafluoroethylene-based polymer and a liquid medium, a method for producing the composition, and a method for producing a dispersion liquid having excellent dispersion stability from the composition. A composition comprising: a particle derived from a tetrafluoroethylene-based polymer powder having a specific surface area of 25 m 2 / g or less, a liquid medium, and, optionally, another polymer dissolved in the liquid medium, wherein the viscosity determined with a B-type viscometer at a temperature of 25°C and a rotation speed of 30 rpm is 8000 to 100000 mPa·s, or the viscosity obtained from a capillary rheometer measurement at a temperature of 25°C and a shear rate of 1 s ‑1 -1 is 10000 to 100000 Pa·s. Also provided is a method for producing the composition by mixing the components of the composition and performing at least one of degassing during or after the mixing and standing after the mixing, and a method for producing a dispersion liquid having the particles derived from the powder dispersed in the liquid medium by diluting the composition with the liquid medium.

The application provides a particle reinforced polymer composite micro-viscosity model and a method for establishing the same. The relationship of the particle reinforced polymer composite micro-viscosity model is shown in formula (1). The model is obtained by respectively passing at least two particle reinforced polymer composites with different proportions through a capillary rheometer to obtain viscosity values of the particle reinforced polymer composites with different proportions at different shear rates at a set temperature, obtaining a relationship between the viscosity of the particle reinforced polymer composites with different proportions and the shear rate, and obtaining model parameters a2 and b2 related to a non-Newtonian index n through linear fitting and model parameters a1 and b1 and model constants a3 and b3 through fitting. According to the technical scheme, the influence of newly added particle materials on viscosity is considered, and the characteristic size factor of a micro part is combined, so that the accuracy of the prediction of the flow characteristics of the polymer composite melt is significantly improved.

1. The name of the design product: capillary rheometer (MLW-500E). 2. The use of the design product: instrument for measuring the rheological properties of high polymer materials. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention discloses a capillary rheometer, and relates to the technical field of rheometers, the capillary rheometer comprises a workbench, a charging barrel, a capillary module, a material pressing rod, a sensor module, a positioning mechanism, a storage mechanism, a heat exchange mechanism and a protection mechanism, the top end of the workbench is fixedly connected with a rack, and the charging barrel is connected with an inner cavity of a through groove in a sliding and penetrating manner; the capillary tube module is connected with an inner cavity of the groove, the pressing rod is fixedly installed at the bottom end of the rack, the sensor modules are symmetrically installed on the two sides of the charging barrel, the positioning mechanism is arranged in the workbench, the storage mechanism is arranged in the workbench, the heat exchange mechanism is connected with the positioning mechanism, and the protection mechanism is arranged on the rack. By means of the arrangement mode that the positioning mechanism, the storage mechanism, the heat exchange mechanism and the protection mechanism are matched, power is provided through the protection mechanism, and the mounting rod in the positioning mechanism can be controlled to move, so that the charging barrel and the capillary tube module are rapidly mounted and dismounted, and the subsequent cleaning efficiency is improved.

Provided are: a metal powder for injection molding, with which it is possible to produce an injection molded body having a low shrinkage rate during sintering and with which it is possible to produce a metal sintered body having high shape accuracy; and a method for producing a sintered body with which it is possible to produce a metal sintered body having high shape accuracy. The metal powder for injection molding is characterized in that in a volume-based cumulative particle size distribution curve obtained by a laser diffraction method, the particle size D50 is 1.0 [mu] m or more and less than 10.0 [mu] m when the cumulative value from the small diameter side is 50%, the average roundness is 0.86-0.95, and the particle size D50 is 1.0-10.0 [mu] m. When a composite for evaluation is prepared by kneading with an organic binder in such a manner that the melt viscosity measured using a capillary rheometer at a shear rate of 100 [s-1] and a temperature of 150 DEG C is 120 [Pas] (1200 [P]), the powder filling rate in the composite for evaluation is 63-75 vol% (inclusive).

A fluorinated copolymer composition comprising a thermoplastic resin A and a fluorinated elastomer B dispersed within the thermoplastic resin A. The thermoplastic resin A has a shear strength (tA) greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 s⁻¹ and 360°C in accordance with ASTM D3835. The fluorinated elastomer B dispersed within the thermoplastic resin A has an average dispersed particle size of less than 50 µm.

The invention relates to a polyamide composition, a polyamide self-crimping fiber and a preparation method thereof, the polyamide composition comprises a first component and a second component, the first component comprises polyamide 56, and the second component comprises polyamide 510; the mass ratio of the first component to the second component is (40-60): (40-60); the difference value between the shear viscosity V56 of the first component and the shear viscosity V510 of the second component meets the following relation: V56-V510 is equal to 26 to 70 Pa.s; wherein V56 and V510 are respectively shear viscosities, measured by a capillary rheometer, of the first component and the second component under the conditions that the temperature is 270 DEG C and the shear speed is 10000 s <-1 >. The polyamide composition provided by the embodiment of the invention is used for preparing polyamide self-crimped fibers, and the prepared fibers can have good mechanical properties.