76 results about "Shear viscosity" patented technology

This invention provides an interlayer film for sandwich photoactive devices and a sandwich photoactive device. The interlayer film for sandwich photoactive devices has the following characteristics: after heat treatment at 90-140℃ for 30-240 minutes, the shear viscosity is 7000-12000 Pa·s at 90℃ and a shear rate of 20 / s, and 5000-9000 Pa·s at 110℃ and a shear rate of 20 / s. The interlayer film provided by this invention has good adhesion and can effectively solve the problem of delamination in sandwich photoactive devices.

This invention provides a low-emission starch-based biodegradable composition and its application. By weight, the low-emission starch-based biodegradable composition comprises 40-92 parts of flexible polyester, 2-10 parts of polylactic acid, 5-35 parts of starch, and 1-15 parts of plasticizer; the zero-shear viscosity of the flexible polyester is 1100-10000 Pa·s; in this invention, a flexible polyester with a specific zero-shear viscosity is compounded with polylactic acid, starch, and plasticizer, resulting in a lower content of aldehyde compounds in the products processed from the biodegradable composition.

This invention discloses a polypropylene composition, its preparation method, and its applications, belonging to the field of polymer materials technology. The polypropylene composition provided by this invention comprises the following components in parts by weight: 23-62 parts PP resin, 18-32 parts POE elastomer, 1-7 parts chopped glass fiber, and 13-27 parts mica powder; wherein the PP resin is prepared at a temperature of 200°C and a shear rate of 100 s. ‑1 melt shear viscosity η PP With POE elastomer at a temperature of 200℃ and a shear rate of 100s ‑1 melt shear viscosity η POE The ratio η PP / η POE The aspect ratio of the chopped glass fibers is 0.38-1.65; the aspect ratio of the chopped glass fibers is 280-350; and the D50 diameter of the mica powder is 15-35 μm. The polypropylene composition provided by this invention has a low linear coefficient of thermal expansion and high coating adhesion.

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 application relates to the technical field of particle flow simulation, in particular to a CAE simulation method for C-type particle flow state based on a double Euler model, which defines model parameters under a secondary agglomeration theoretical model according to the agglomeration mechanism of C-type particles from initial agglomeration to secondary agglomeration, the model parameters including particle phase diameter, particle phase density, particle phase volume fraction and particle phase shear viscosity, thereby establishing a local dynamic agglomeration particle model (LDAP model) for C-type particles based on an Euler multiphase flow model, and performing C-type particle flow state simulation; the method can realize the setting of numerical simulation conditions and the simulation of the flow behavior of C-type particles through simple flow field calibration and parameter setting, can intuitively reflect the real-time state of the particle agglomerate diameter at any local position in the flow field, has higher accuracy in describing the motion state of particles and gas under the condition of particle agglomerate diameter difference, and can balance the calculation efficiency without increasing the number of particle phases for varying particle diameters.

The present invention pertains to a multi-part cosmetic composition which has both a physical property providing good adhesion for preventing dripping during mixing at the time of use and during application to keratin tissues such as skin and hair, and a physical property providing ease of spreading after application.　The present invention provides a multi-part cosmetic composition which comprises a plurality of constituent preparations including a preparation I and a preparation II, wherein the preparations I and II each comprise a component (A) that is an ionic surfactant, a component (B) that is a cationic polymer, a component (C) that is a higher alcohol, and a component (D) that is a nonionic surfactant and have different viscosities at least at 30°C, and all of the constituent preparations are mixed together upon use. The viscosity ratio (preparation II / preparation I) of the viscosity of the preparation II at 30°C to the viscosity of the preparation I at 30°C is 3 or more, and the ratio of the shear viscosity a of a mixture prepared by mixing all of the constituent preparations together at a shear rate of 0.0037 S-1 to the shear viscosity b of the mixture at a shear rate of 139 S-1, i.e., (shear viscosity a / shear viscosity b), is 5000 or more when the shear rate is changed from 0.001 S-1 to 1000 S-1 and the shear viscosities are measured with a rheometer at 25°C.

The invention provides an injection hydrogel for vascular embolism treatment and a preparation and formula optimization method thereof. The hydrogel formula comprises two or more 2-arm or multi-arm polyethylene glycol polymers containing functional groups which can be cross-linked with each other, lithium magnesium silicate and a contrast agent. The formula optimization method comprises the following steps: designing an orthogonal experiment, systematically investigating the influence of raw material factors (such as polyethylene glycol molecular weight, functional groups, concentration and the like) on product performances of shear viscosity eta, compression strength sigma c and tensile strength sigma t, and obtaining basic experiment data; establishing a chemical reaction kinetic model and a product performance prediction model based on machine learning based on the data; determining a multi-objective optimization objective function according to product performance requirements; establishing a non-linear multi-objective equation set for formula optimization in combination with a material proportioning relationship; solving the optimization model by adopting an intelligent optimization algorithm to obtain a preliminary optimization formula; carrying out an optimization experiment under a small-scale test condition to obtain new experiment data, and updating model parameters; and the optimization iteration is repeated until convergence.

Provided is a polyurea which has a number-average molecular weight Mn of 6,000-50,000, and in which the ratio (ηEa / ηEb) of the shear viscosity ηEa (Pa･s) at a shear rate of 0.1 (1 / s), measured at 20°C above melting point, to the shear viscosity ηEb (Pa･s) at a shear rate of 10 (1 / s), measured at 20°C above melting point, is 1.1-10.0.

A photo-curable composition can include a photo-curable resin and a photoinitiator. The photo-curable composition can typically have a shear viscosity of less than 1 Pa·s at 100° C. at a shear rate of 50 s−1 and can typically include a first prepolymer, a second prepolymer, and a reactive diluent.

This invention discloses a method for reverse regulation of asphalt based on multi-parameter coupling of chemical composition, multi-level structure, and rheological properties. The method acquires multi-dimensional data such as chemical composition parameters (component content and elemental content), multi-level structural characteristics (molecular packing, micelles, and colloidal structure), and rheological property indices (zero-shear viscosity, low-temperature complex modulus, temperature sensitivity, and crossover frequency) of asphalt. Based on this, statistical screening and correlation analysis methods are used to establish the multi-parameter coupling relationship between the chemical composition, multi-level structure, and rheological properties of asphalt, identify the main controlling factors, construct their regulation paths, and establish a reverse regulation framework that infers the structure and composition from the target rheological properties. This invention complements traditional empirical trial-and-error methods and design methods based on single performance indicators, enabling systematic analysis and comprehensive regulation of asphalt material properties from a holistic perspective of multi-parameter coupling, thus improving the scientific rigor and reliability of on-demand material design.

Described herein is an absorbent article having an absorbent core. The absorbent core includes a superabsorbent polymer material and an auxiliary adhesive. The auxiliary adhesive includes from about 20% to about 70% of a first polymer and from about 30% to about 80% of a second polymer. The auxiliary adhesive has a Shear Viscosity at 10 (1 / s) at 230° C. of from about 300 mPa·s to about mPa·s.

To provide a multi-agent type cosmetic composition having both physical properties of exhibiting good adhesiveness to prevent dripping when mixed in use or when applied to keratin tissues such as skin and hair, and physical properties of exhibiting spreadability after application.SOLUTION: A multi-agent type cosmetic composition comprising a plurality of constituent agents including the following components (A) an ionic surfactant, component (B) a cationic polymer, component (C) a higher alcohol, and component (D) a nonionic surfactant, wherein the composition comprises agents I and II having different viscosities at least at 30°C, and the viscosity ratio (agent II / agent I) of the viscosity of agent II at 30°C to the viscosity of agent I at 30°C is 3 or more, and a ratio (shear viscosity a / shear viscosity b) of a shear viscosity a at a shear rate of 0.00037 s-1 to a shear viscosity b at a shear rate of 139S-1, which is measured by a rheometer at 25 °C. when the shear rate is changed from 0.0001 s-1 to 10000s-1, is 5000 or more.

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.

A composition contains: (a) a first polyorganosiloxane; (b) 50-80 volume percent, based on composition volume, of conductive fillers; and (c) 0.1 to 2.0 weight-percent, based on composition weight, of a second polyorganosiloxane different from the first polyorganosiloxane, the second polyorganosiloxane having an average of 0.5 to 1.5 anhydride groups per molecule.

Provided is a film adhesive that contains a thermosetting resin component and an elastomer and may also contain an inorganic filler. The inorganic filler content is 0–5 mass% of the total mass of the film adhesive. The shear viscosity at 120°C is no more than 10000 Pa⋅s.

This invention discloses a method for preparing two-dimensional composite materials and their composite films with low energy consumption using surface anchoring effect. The preparation method of the two-dimensional composite material of this invention includes the following steps: S1, dissolving a surface anchoring agent in a polar solvent to obtain an agent solution; the surface anchoring structure of the surface anchoring agent includes one or more of amino, ammonium salt, carbonyl, carboxyl, ester, and hydroxyl groups; the molecular weight of the agent is ≤3 million; the viscosity of the agent solution at 25°C is 800-10000 mPa·s, and the zero-shear viscosity is 100-1000 s. ‑1 The viscosity ratio at high shear rates is ≤10; S2, the layered two-dimensional matrix powder is mixed with the additive solution to obtain a suspension; S3, mechanical force is applied to the suspension for assisted exfoliation to obtain a two-dimensional composite material containing two-dimensional materials and surface anchoring additives. This invention maximizes the use of input mechanical force to achieve low-energy preparation of large-size, thin, and highly functionalized two-dimensional materials, which can be directly processed into high-performance thin films.

The present invention relates to an object comprising a sealing layer, wherein the sealing layer comprises a polyethylene comprising moieties derived from ethylene and moieties derived from an α-olefin comprising 4 to 10 carbon atoms, the polyethylene having a density of ≥ 870 and ≤ 920 kg / m3, preferably of ≥ 890 and ≤ 910 kg / m3, as determined in accordance with ASTM D792 (2013), wherein the polyethylene has a zero-shear viscosity of ≤ 12.0 kPaꞏs, as determined in accordance with ISO 6721-10 (2015). Such object exhibits a desirably low seal initiation temperature, and a desirably high hot tack strength.

A nutritional composition comprising at least one material from fruit, the nutritional composition further comprising at least one plant protein, and the nutritional composition having a shear viscosity between 260 mPa·s and 460 mPa·s, when measured at 20°C and a shear rate of 100 s-1, and the nutritional composition has: a protein level of between 3.6 g and 5.4 g per 100 ml of the nutritional composition; and / or a caloric density of between 1.3 kcal / ml and 1.5 kcal / ml of the nutritional composition.

The present invention pertains to a multi-agent cosmetic composition having both physical properties that exhibit good adhesion for preventing dripping during mixing at the time of use or during application to keratin tissue such as skin or hair, and physical properties that exhibit ease of spreading after the application.　Specifically, the present invention pertains to a multi-agent cosmetic composition that contains the following components (A) an ionic surfactant, (B) a cationic polymer, (C) a higher alcohol, and (D) a nonionic surfactant, that contains a plurality of constituent agents including an agent I and an agent II that have different viscosities at least at 30℃, and that is to be used by mixing all of the constituent agents at the time of use. The viscosity ratio (agent II / agent I) of the viscosity of the agent II at 30°C to the viscosity of the agent I at 30°C is 3 or more, and, in a mixture obtained by mixing all the constituent agents, the ratio (shear viscosity a / shear viscosity b) of the shear viscosity a at a shear rate of 0.0037 S-1 to the shear viscosity b at a shear rate of 139 S-1 measured at 25°C by a rheometer when the shear rate is changed from 0.001 S-1 to 1000 S-1 is 5000 or more.

The present application relates to the technical field of oil-water separation in petroleum chemical industry, and particularly relates to a viscosity-reducing and coalescence-separating integrated device. The device comprises a dynamic and static shear viscosity-reducing unit and a spiral coalescence-separating unit. The dynamic and static shear viscosity-reducing unit comprises a viscosity-reducing window cylinder, the viscosity-reducing window cylinder is connected with a plurality of viscosity-reducing rotating discs, and the plurality of viscosity-reducing rotating discs are connected with a lock-type central overflow pipe. The spiral coalescence-separating unit comprises a coalescence conical cylinder, the coalescence conical cylinder is connected with the viscosity-reducing window cylinder, the inner side of the coalescence conical cylinder is connected with a tangential inlet disc, the tangential inlet disc is connected with a material coalescence inverted cone, the tail end of the tangential inlet disc is connected with an equal-pitch central overflow pipe, the equal-pitch central overflow pipe is connected with an equal-pitch spiral flow channel, the tail end of the equal-pitch central overflow pipe is connected with a variable-pitch central overflow pipe, and the variable-pitch central overflow pipe is connected with a variable-pitch spiral flow channel. The viscosity-reducing and coalescence-separating integrated device solves the problems of high viscosity of oil well produced liquid and serious emulsification.

The invention provides a filling agent for PHA injection as well as a preparation method and application of the filling agent. The filling agent comprises PHA microspheres, a gel carrier sodium carboxymethyl cellulose, an osmotic pressure regulator, a pH regulator and water for injection. The invention systematically studies the influence of the gel carrier and the osmotic pressure regulator on the properties of the composition in the aspects of shear viscosity, osmotic pressure and the like, and scientifically screens to obtain an excellent and stable gel prescription. The filling agent disclosed by the invention has a wide application prospect in the field of medical cosmetology.

An ethylene interpolymer product comprises a first component with an undetectable level of long-chain branches and a second component with a detectable level of long-chain branches wherein said first component has a weight-average molecular weight higher than said second component. The ethylene interpolymer product is characterized as having (a) an Arrhenius type flow activation energy Ea greater than or equal to 33 kJ / mol and less than or equal to 45 kJ / mol; and (b) a number-average relaxation time tn measured at 190° C. greater than or equal to 2 ms and less than or equal to 15 ms, wherein said number-average relaxation time is calculated using zero-shear viscosity η0 at 190° C. in kPa·s and plateau modulus Formula (I) at 190° C. in MPa, according to Formula (II). Film made from the ethylene interpolymer product may be characterized by a hot-tack peak strength from about 12 N to about 20 N and a lubricated puncture resistance from about 100 J / mm to about 150 J / mm.GN0Formula⁢ (I)τn=η0GN0.Formula⁢ (II)

Provided are: an adhesive composition comprising (i) (meth)acrylic prepolymer having a hydroxyl group and an alkyl group, and (ii) at least one of an aromatic group-containing (meth)acrylate, an alicyclic group-containing (meth)acrylate, and a heteroalicyclic group-containing (meth)acrylate, and having a shear viscosity of about 0.04 Pa·s or less at 40° C., wherein an adhesive layer formed of the adhesive composition has a modulus of about 0.3 MPa or less at −20° C. and a peel strength of about 400 gf / in or more; an adhesive layer formed therefrom; and an optical display device comprising same.

The present invention provides grease for a vacuum actuator, the grease comprising the following components (a) and (b): (a) a perfluoropolyether as a base oil, the perfluoropolyether having a kinematic viscosity at 40°C of 100 mm2 / s or more and less than 200 mm2 / s and having a vapor pressure at 20°C of 1.0 × 10-7Pa or less; and (b) a polytetrafluoroethylene as a thickener. The shear viscosity of the grease at 25°C is 4500 mPa·s or less.

A dynamic molecular repair technology for recycled polyolefin, repair the molecular damages of polyolefin induced by mechanical recycling, where dynamic bonds are introduced between degraded chains of polyolefins, under dynamic borate exchange of transesterification reaction, to chemically bridge smaller polymer chains into larger ones, thereby increasing the mechanical properties of polyolefin recyclates. The dynamic molecular repaired polyolefins show no more than 10% decrease in tensile strength, impact strength, and zero-shear viscosity, and no more than 20% decrease in elongation, compared with virgin resin.

[Problem] The present invention provides a PTFE binder dispersion excellent in output characteristics when made into an electrode, wherein polytetrafluoroethylene is used as a binder. The present invention also provides: electrode slurry which uses said PTFE binder dispersion; and a battery electrode which uses said electrode slurry. [Solution] A PTFE binder dispersion 30 in which the number average molecular weight Mn of PTFE is 10000-35000, D / P is 0.1%-10%, the amount of PTFE blended is 10-70 wt% of the total amount, the cumulant average particle diameter is 0.3 μm or more and less than 3.0 μm, and the shear viscosity ratio (38.3s-1 viscosity / 3.83s-1 viscosity) is 0.1-0.6, and an electrode slurry 40 using same are excellent in coatability. A battery electrode 80 using the PTFE binder dispersion 30 or electrode slurry 40 has high output characteristics.

The LCP fiber coloring master batch comprises the following components in parts by weight: 59-81 parts of first LCP resin; 15 to 25 parts of non-liquid crystalline polyester; 2-4 parts of a polyester toughening agent; 5 to 20 parts of toner; and the shear viscosity eta 5000 / eta 1000 of the first LCP resin ranges from 0.45 to 0.55. Through the first LCP resin with a specific shear thinning coefficient, the non-liquid crystal polyester with a specific content and the polyester flexibilizer, the master batch suitable for LCP fiber coloring can be obtained, and the master batch has the advantages of being good in spinning effect, good in coloring fastness and good in coloring property.

A resin composition includes: at least two monofunctional (meth)acrylates, at least one bifunctional (meth)acrylate, and at least one photoinitiator. The resin composition has a shear viscosity of about 8 mPa·s to about 50 mPa·s as measured at a temperature of about 25° C. according to JIS Z8803, and an apparent extensional viscosity of about 100 mPa·s or less under conditions of the temperature of about 25° C. and a Hencky strain of about 6.

The present invention provides an ethylene-α-olefin copolymer which is excellent in moldability and particularly excellent in mechanical strength compared with the prior art. The copolymer of ethylene and an α-olefin having 4 to 10 carbon atoms satisfies the following conditions (1) to (7). (1) The density is 890 to 925 kg / m 3 ; (2) The MFR (190°C, 2.16 kg load) is 3.0 to 15.0 g / 10 minutes; (3) The MT (melt tension) / η * (shear viscosity) is 1.40 x 10 ‑4 to 2.90 x 10 ‑4 g / P; (4) 0.01 x 10 ‑13 x Mw 3.4 ≤ η0 (zero shear viscosity) ≤ 4.5 x 10 ‑13 x Mw 3.4 ; (5) -2.0 ≤ Mz / Mw - Mw / Mn ≤ 15; (6) The number of ethylene groups and the like is 0.1 to 1.0 per 1000C; and (7) The DSC melting curve has multiple peaks.

Disclosed is a film adhesive that contains a thermosetting resin component, an elastomer, and an inorganic filler. The inorganic filler is formed from a substance that has a thermal conductivity of 10–2000 W / (m·K) at 20°C. The inorganic filler content is at least 70 mass% of the entire film adhesive. The shear viscosity at 120°C is 4500–24000 Pa·s.