27 results about "Static friction coefficient" patented technology

This application discloses an intelligent friction coefficient measurement system, method, electronic device, and storage medium, relating to the field of friction coefficient measurement. The system includes an intelligent traction trolley, a detection block of known weight, a traction rope, a tension sensor, and an image acquisition device. The intelligent traction trolley includes a vehicle body, a main control module, a drive motor, and a human-machine interface module. The intelligent traction trolley moves at a constant speed via the drive motor, causing the detection block to move synchronously. The tension sensor measures the tension in real time, and the image acquisition device acquires images of the target to determine the spatial attitude parameters of the traction rope. The main control module calculates the actual effective tension based on the spatial attitude parameters and the tension signal, and then calculates and displays the maximum static and dynamic friction coefficients in conjunction with the weight of the detection block. This solves the problems of insufficient measurement accuracy, poor operational stability, and errors caused by the attitude of the traction rope in existing technologies, achieving automated, high-precision intelligent measurement.

The present invention provides a fixing device capable of suppressing the displacement of a sliding member that comes into contact with a rotating fixing belt at the fixing nip section. [Solution] The fixing device 8 comprises a fixing belt 81, a sliding member 85, a nip forming member 84, and a pressure roller 82. The sliding member 85 is sheet-shaped and is positioned adjacent to the radially inner side of the fixing belt 81, with the inner circumferential surface of the rotating fixing belt 81 sliding into contact with it. The nip forming member 84 is positioned radially inner of the fixing belt 81, with the sliding member 85 sandwiched between it and the inner circumferential surface of the fixing belt 81. The static friction coefficient between the sliding member 85 and the nip forming member 84 is 0.3 or more.

To provide heat-sealable paper that reduces environmental impact, is easy to open, and is resistant to tearing during opening, as well as rolls, packaging bags, and packaging bodies made using the heat-sealable paper. [Solution] A heat-sealable paper having a heat-seal layer on one side of a paper substrate, wherein the paper substrate content in the heat-sealable paper is 50% by mass or more, and the geometric mean of the pure bending stiffness in the longitudinal direction and the pure bending stiffness in the transverse direction of the heat-sealable paper is 0.80 g·cm 2 A heat-sealable paper having a length of 1.8 kN / m or less, a longitudinal tensile strength of 1.8 kN / m or more, and a static friction coefficient of 0.750 or less on the side of the heat-sealable layer opposite to the paper substrate.

The application is suitable for the technical field of machine tool combination assembly, and provides a micro contact joint surface static friction coefficient calculation method, which comprises the following steps: obtaining joint surface characteristic parameters; based on fractal theory and elastic theory, constructing base additional deformation and micro convex body normal deformation equation, through micro stress analysis, establishing single micro convex body deformation geometric parameters; considering three deformation stages of micro convex body, obtaining joint surface contact area and contact load; using modified island distribution function to integrate joint surface real contact area and contact load in different deformation stages, obtaining joint surface real contact area and contact load; considering the influence of static friction coefficient on contact surface characteristics, establishing joint surface static friction coefficient model. The application establishes surface static friction coefficient model from the micro contact angle, and simultaneously considers the interaction of micro convex body and base and three stages of material elastic, elastic-plastic and complete plastic deformation.

This utility model discloses an anti-slip knitted fabric, relating to fabric technology. The key technical points are: it includes a surface layer and a bottom layer; the bottom layer has several pleats; the surface layer has raised strips; and the bottom layer has anti-slip strips. The anti-slip strips increase the maximum static friction between the bottom layer and the mattress, reducing the possibility of relative sliding. The pleats, by changing the surface roughness of the bottom layer, also increase the maximum static friction coefficient between the bottom layer and the mattress, further reducing the possibility of relative sliding. The use of GB1 and GB2 combed yarns, made from modal fibers twisted together, ensures the moisture absorption capacity of the surface layer, guaranteeing its comfort.

This invention provides a safety verification method for clamping battery cell modules into a box. The safety verification method includes the following steps: Step 1, determining the clamping force F of the clamp. 夹 A static friction test bench was built, and the static friction between the urethane block and the blue film was tested and analyzed on the test bench to determine the clamping force F of the fixture. 夹 Step 2: Determine the cumulative relative displacement ΔL of the battery cells in the module in the Z direction. 总 This safety verification method determines the minimum reliable clamping force in the Y direction by studying the static friction coefficient of the clamp on the side of the module; and determines the maximum cumulative relative displacement of the battery cell in the Z direction by studying the deformation curve of the relationship between ΔLmax and τ of the double-sided adhesive foam. This provides data support for the design of the module clamping and boxing tooling, ensuring the reliability of the clamp for module handling when the battery cell module is clamped and boxed.

The present application provides a laminate capable of achieving excellent slidability regardless of whether or not a user's finger is wetted with water, an optical member with the laminate, and an image display device. The laminate of the embodiment of the present application has a substrate and a functional layer disposed on one side in the thickness direction of the substrate, and the static friction coefficient and the kinetic friction coefficient of the functional layer surface measured using a contact wetted with water are both 0.13 or less in a specific friction test based on a Bowden method of surface contact.

This invention relates to the field of interfacial friction testing technology for particulate materials, and provides a device and method for measuring the static and dynamic friction coefficients of irregular particulate materials. The method includes: obtaining static and dynamic friction forces based on the effective friction torque, the time interval during which the tip of the Reuleaux triangular grinding ring sweeps against the bottom of the square constraint cavity, and the stable time interval during which the long arc end of the Reuleaux triangular grinding ring sweeps against the bottom of the square constraint cavity, and then obtaining the static and dynamic friction coefficients. The device and method of this invention should be able to simulate the compaction, embedding, sweeping, and restarting processes of particulate materials within a confined gap, obtaining static, dynamic, static, and dynamic friction forces, and the static and dynamic friction coefficients within the same particle placement state and the same test cycle. It also possesses multi-condition testing capabilities, including atmospheric pressure without liquid, atmospheric pressure with liquid or drilling fluid, and vacuum without liquid, thereby providing a basis for evaluating the anti-slip ability, anti-migration ability, environmental sensitivity, and wellbore reinforcement suitability of particulate materials.

A fixing device includes a fixing belt, a sliding member, a nip forming member, and a pressing member. The sliding member is sheet-form and is disposed radially inward of the fixing belt to be adjacent to it such that the inner circumferential surface of the rotating fixing belt makes contact with, while sliding across, the sliding member. The nip forming member is disposed radially inward of the fixing belt, across the sliding member from the inner circumferential surface of the fixing belt. The coefficient of static friction between the sliding member and the nip forming member is 0.3 or more.

One embodiment of the present application provides an optical film and a display device including the same, wherein the optical film includes a light-transmissive substrate and a coating layer, and has a coefficient of friction index value of 0.1 or less, a light transmittance of 89.5% or more based on a thickness of 50 μm, and a yellowness index (Y.I.) of 1.0 or less based on a thickness of 50 μm, wherein the coefficient of friction index is represented by Equation 1: [Equation 1] Coefficient of friction index = static coefficient of friction - kinetic coefficient of friction.

A wheel bearing arrangement (1) comprises a wheel hub (10) with an internal toothing (12), a wheel bearing (20) arranged on the wheel hub (10), a constant velocity joint (30) with an axle journal (32), wherein the axle journal (32) has an external toothing (33) which engages with the internal toothing (12) of the wheel hub (10) for torque transmission, and a clamping device (40) by means of which the wheel hub (10) including the wheel bearing (20) is axially clamped against the constant velocity joint (30) such that an inner bearing ring (21) of the wheel bearing (20) is pressed against a contact shoulder (34) of the constant velocity joint (30). A metallic, uncoated friction ring (50) is arranged between the inner bearing ring (21) and the contact shoulder (34), the sliding friction coefficient for which the contact coefficient against the inner bearing ring (21) and the contact shoulder (34) is at least 80% of the static friction coefficient.

The present invention relates to: a heat-sealing paper with which it is possible to obtain a packaging bag and a package that have a reduced load on the environment, are easy to open, and are not easily torn by an operation during opening; and a roll, a packaging bag, and a package that are formed using the heat-sealing paper.　The heat-sealing paper comprises a heat-sealing layer on one face of a paper base material. The content of the paper base material in the heat-sealing paper is 50 mass% or greater. The geometric mean of the pure bending stiffness in the longitudinal direction and the pure bending stiffness in the lateral direction of the heat-sealing paper is 0.80 g·cm2 / cm or less. The vertical tensile strength of the heat-sealing paper is 1.8 kN / m or greater. The coefficient of static friction of a surface of the heat-sealing layer on the opposite side to the paper base material is 0.750 or less.

The present invention provides a rubber composition for grips that yields crosslinked rubber with a high static friction coefficient. [Solution] The rubber composition for grips contains a base rubber, hard porous carbon particles, and a vulcanizing agent, wherein at least a portion of the hard porous carbon particles is composed of glassy carbon, and the content of the hard porous carbon particles is 1.5% to 8.5% by mass of 100% by mass of the rubber composition.

This application discloses an optical film molding fixture, comprising a base, a molding structure, and an anti-slip material. The molding structure protrudes from one side of the base and has a curved surface. The molding structure is configured to compress the optical film, deforming it into a predetermined shape. The anti-slip material is disposed on the curved surface of the molding structure. A first static friction coefficient exists between the curved surface and the optical film, and a second static friction coefficient exists between the anti-slip material and the optical film, the second coefficient being greater than the first. The anti-slip material provides an increased frictional force, thereby preventing excessive strain on the optical film after the pre-forming step, which could affect its optical properties and ensure the quality of the optical film.

This invention discloses a particle filtration method for improving the accuracy of DEM simulation evaluation of the crushing capacity of a semi-autogenous mill, belonging to the field of mineral processing technology. The method includes the following steps: S1, measuring the discrete element physical parameters, angle of repose, and static friction coefficient of the ore particles and liner material to establish a simulation model of the ore in the DEM; S2, initializing the autogenous mill equipment and related models and parameters for particle crushing and filtration in the DEM; S3, setting the maximum simulation duration and performing simulation calculations for ore particle crushing and filtration; S4, outputting the particle size change history after the simulation ends, obtaining the stable crushing particle size distribution under specific lifting stripe morphology and specified rotational speed of the semi-autogenous mill. Using the above method, this invention can dynamically identify, remove, or filter out small particles deposited at the bottom that contribute little to the effective crushing process or even have a negative impact, enabling a comprehensive and detailed evaluation of the true crushing capacity of the semi-autogenous mill liner structure.

A foaming adhesive sheet comprising a substrate and an adhesive layer placed on at least one surface side of the substrate; wherein the adhesive layer includes a curable adhesive, and a forming agent; the adhesive layer is placed on an outermost surface; a pressure-sensitive adhesive force of the adhesive layer is 0 N / 25 mm or more and 0.1 N / 25 mm or less; a static friction coefficient of a surface of the adhesive layer opposite to the substrate is 0.30 or less; and a pencil hardness of a surface of the adhesive layer opposite to the substrate is F or more.

This invention relates to a high static friction coefficient anti-slip mat, comprising a surface layer and a foamed inner layer, the foamed inner layer being covered by the surface layer; the high static friction coefficient anti-slip mat, tested according to the ASTM D1894 standard method, has a static friction coefficient of 0.58 to 1.4; and the high static friction coefficient anti-slip mat is manufactured by injection molding a supercritical fluid mixture of a polymer material and a supercritical fluid; wherein the polymer material comprises a thermoplastic polyether ester elastomer, a thermoplastic polyurethane, or a combination thereof, and the elongation at break of the polymer material is 300% or more; the thermoplastic polyether ester elastomer has a melt index of less than 20 g / 10 min at 230°C and a Shore hardness D of 30D to 45D; the thermoplastic polyurethane has a melt index of less than 25 g / 10 min at 205°C and a Shore hardness A of 60A to 95A.

The application discloses a kind of friction material for reducing Groan noise and preparation method and application thereof, it is related to prevent or reduce noise technical field.The friction material is prepared from friction-reducing agent, binder, reinforcing fiber and friction modifier, wherein, composite modified polytetrafluoroethylene suspension resin is included in friction-reducing agent, which is prepared by modifying polytetrafluoroethylene with black phosphorus and sodium phlogopite.The application improves the thermal conductivity and wear resistance of polytetrafluoroethylene by the combined modification of black phosphorus and sodium phlogopite, which improves the thermal conductivity of the friction material, thereby avoiding the decrease of friction coefficient caused by the increase of friction interface temperature.This effect can significantly reduce the difference (Δμ) between dynamic and static friction coefficients between the brake pad and brake disc made of the friction material, thereby reducing the occurrence of stick-slip phenomenon, and ultimately achieving the purpose of reducing Groan noise, while ensuring that the friction material has sufficient wear resistance.

Provided is a release paper in which printing can be performed on a release layer. Also provided is a thermal recording body that is peelable from a topcoat layer and printing can be performed on the topcoat layer.　A release paper 1 is provided with a paper base material 2 and a release layer 3 provided on the paper base material 2. The release layer 3 contains a vinyl acetate-silicone copolymer resin. A surface of the release layer 3 has a dynamic friction coefficient of 0.30 or smaller. A surface of the release layer 3 has a static friction coefficient of 0.19 or larger. A thermal recording body 4 has a structure in which an adhesive layer 5, a thermal recording layer 9, and a topcoat layer 11 are laminated. The topcoat layer 11 contains a vinyl acetate-silicone copolymer resin. A surface of the topcoat layer 11 has a dynamic friction coefficient of 0.30 or smaller. A surface of the topcoat layer 11 has a static friction coefficient of 0.19 or larger.

The present invention provides release paper that can be printed on the release layer, and also provides a thermal recording medium that is peelable from the topcoat layer and printable on the topcoat layer. The release paper 1 comprises a paper substrate 2 and a release layer 3 provided on the paper substrate 2. The release layer 3 contains a vinyl acetate-silicone copolymer resin. The dynamic friction coefficient of the surface of the release layer 3 is 0.30 or less, and the static friction coefficient of the surface of the release layer 3 is 0.19 or more. The thermal recording body 4 has a structure in which an adhesive layer 5, a thermal recording layer 9, and a top coat layer 11 are laminated. The top coat layer 11 contains a vinyl acetate-silicone copolymer resin. The dynamic friction coefficient of the surface of the top coat layer 11 is 0.30 or less, and the static friction coefficient of the surface of the top coat layer 11 is 0.19 or more.

This invention discloses a motor, a suspension assembly, and a vehicle, relating to the field of vehicle technology. It aims to solve the problem of significant frictional noise during motor startup, leading to poor NVH performance and a subpar driving experience. The motor includes a first assembly, a second assembly, and at least one bearing. The bearing is fixed to the first assembly, and the second assembly is slidably fitted onto the bearing. The static friction coefficient between the second assembly and the bearing is μ1, and the dynamic friction coefficient between the second assembly and the bearing is μ2. μ1 and μ2 satisfy: 1 ​​< μ1 / μ2 ≤ 2.

A linerless label (3) includes: a base material layer (10); and an adhesive layer (30) that is provided on the rear surface of the base material layer and is made of a material activated by irradiation with optical energy. The static friction coefficient of the adhesive layer in a state where the adhesive layer is not activated is 2.0 or less, and the adhesive strength of the adhesive layer is 2.0 N / 25 mm or more.

To provide heat-sealable paper that reduces environmental impact, is easy to open, and is resistant to tearing during opening, as well as rolls, packaging bags, and packaging bodies made using the heat-sealable paper. [Solution] A heat-sealable paper having a heat-seal layer on one side of a paper substrate, wherein the paper substrate content in the heat-sealable paper is 50% by mass or more, and the geometric mean of the pure bending stiffness in the longitudinal direction and the pure bending stiffness in the transverse direction of the heat-sealable paper is 0.80 g·cm 2 A heat-sealable paper having a length of 1.8 kN / m or less, a longitudinal tensile strength of 1.8 kN / m or more, and a static friction coefficient of 0.750 or less on the side of the heat-sealable layer opposite to the paper substrate.

This invention relates to the field of electrical winding wire preparation technology, specifically to a method for preparing high-slip enameled wire and its application. This invention addresses the aspects of substrate source control, process control, and functional varnish modification: high-purity T1 copper rods are selected, and subsurface defects are strictly controlled through multiple wire drawing processes combined with intermediate pre-annealing; a two-stage finished product annealing process is employed to precisely control the copper conductor grain structure; gradient curing of the bottom layer of polyurethane insulating varnish improves the adhesion of the varnish film; and a functional layer is constructed using a polyether-modified polysiloxane-modified self-lubricating polyamide-imide varnish. The resulting enameled wire has a static friction coefficient ≤0.07, and surface pinholes and particle defects are reduced by more than 90%. This invention solves the problems of high friction, easy varnish film cracking, numerous surface defects, and poor lubrication stability in traditional enameled wires during high-speed automatic winding and vertical winding processes. It can be widely applied to automated winding production in fields such as micromotors, servo motors, and vertical winding transformers.

A wafer cleaning and polishing pad includes a pad having a polishing surface, wherein the polishing surface includes a first material having a Shore D hardness ranging from 50 to 80 and a static coefficient of friction ranging from 0.01 to 0.6. The first material is a fluoropolymer. The pad includes a middle layer and / or a base under the polishing surface. The base includes a second material and the middle layer includes a third material having a lower surface hardness and a higher coefficient of friction than the first material. The polishing surface includes a plurality of grooves with varying groove depth from center of the pad to an edge of the pad.

The present invention provides a V-belt for power transmission that ensures a friction coefficient that provides the same level of appropriate slippage and noise resistance during driving as a wrapped V-belt, while maintaining transmission performance without a decrease in the friction coefficient during driving. [Solution] A surface rubber layer is formed from a crosslinked rubber composition containing rubber components and short fibers, covering at least a portion of the side surface of the belt body and forming a friction transmission surface, and the short fibers are oriented in a direction parallel to the friction transmission surface. The static friction coefficient in the belt movement method on the friction transmission surface may be 1.2 to 1.4. The proportion of the short fibers may be 15 to 50 parts by mass per 100 parts by mass of the rubber component. The average thickness of the surface rubber layer may be 1 to 2 mm. The entire side surface of the belt body (especially the entire surface) may be covered with the surface rubber layer. The short fibers may be oriented in a direction perpendicular to the length of the belt on the friction transmission surface.