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74results about How to "Uniform resistance distribution" patented technology

Far infrared flexible wearable heating sheet and preparation method and application thereof

The invention discloses a far infrared flexible wearable heating sheet and a preparation method and an application thereof. The preparation method comprises the following steps that at least one flexible heating body and a flexible insulating material layer are provided, wherein each flexible heating body is electrically connected with an electrode; the flexible heating body comprises a carbon material heating film, wherein the carbon material heating film comprises a carbon material layer, parallel electrodes or interdigital electrodes arranged at the two ends and/or on the two sides of the carbon material layer, and high-temperature-resistant insulating layers for covering the two sides of the carbon material layer; and the flexible insulating material layer is arranged on the two opposite sides of the flexible heating body, and lamination and curing are performed by fast pressing or transfer pressing equipment, so that sealing and insulation of the heating body and the electrode arerealized, wherein the carbon material heating film is prepared by wet coating. According to the preparation method, batch consistency preparation of the flexible carbon material heating film is realized by utilizing a wet-process coating technology; and through electrode design, the carbon material heating film can be driven by a low voltage so as to generate heat, and application to the field offlexible wearable heating can be realized finally.
Owner:SUZHOU HANANO MATERIALS TECH LTD

Conductive rubber roller and imaging device

ActiveCN103105761AMeet the resistance value requirementsLow voltage dependencePolyurea/polyurethane coatingsElectrographic process apparatusSurface layerBulk fill
The invention provides a conductive rubber roller. The conductive rubber roller comprises a metal shaft core, an elastic layer packed outside the metal shaft core and a surface layer formed outside the elastic layer, wherein the elastic layer consists of rubber A and at least one of conductive fillers filled in the rubber A; the threshold value range of the conductive fillers in the rubber is as follows: a conductive filler valve is greater than or equal to Zb and is less than or equal to Yb; and b/Yb+c/Yc+...q/Yx is greater than or equal to 1 if the filling fractions of the conductive fillers B, C,...X in the rubber A are respectively set to be b, c,...q. According to the conductive rubber roller provided by the invention, the filling number of the conductive fillers of the elastic layer is limited, and an integral resistance value of the rubber roller is adjusted according to the resistance difference between an inner layer structure and an outer structure layer, so that the conductive rubber roller is less in dependency to voltage, and is less fluctuated by the environment change, the resistance is even in distribution, and the increase of the rigidity of the rubber roller since a mass of the conductive fillers are filled into the elastic layer can be avoided; and therefore, not only can the cost of the material be reduced, but also the whole flexibility of the rubber roller can be guaranteed. The invention further discloses an imaging device which comprises the conductive rubber roller.
Owner:SHENZHEN LEPUTAI TECH CO LTD

Polytetrafluoroethylene (PTFE) base electrothermal thick film and manufacturing method thereof

The invention discloses a polytetrafluoroethylene (PTFE) base electrothermal thick film, comprising the following materials according to percentage by weight: 20-30% of flake graphite, 8-15% of acetylene black, 5-8% of carbon fiber powder, 4-6% of short carbon fiber, 5-8% of nickel powder, 5-8% of silver powder, 1-3% of manganese dioxide, 1-3% of iron sesquioxide, 1-3% of carbon black dispersant, 20-25% of PTFE dispersion liquid and 10-25% of PTFE diluent. The invention also discloses a manufacturing method of the PTFE base thick film, comprising the steps of grinding and uniformly mixing the flake graphite, the acetylene black, the carbon fiber powder, the short carbon fiber, the nickel powder, the silver powder, the manganese dioxide and the iron sesquioxide according to the proportion, mixing and ultrasonically dispersing the mixture, the carbon black dispersant, the PTFE dispersion liquid and the PTFE diluent according to the proportion to prepare a electrothermal thick film paste, and drying and sintering the electrothermal thick film paste, after a through printing process so as to manufacture the PTFE base electrothermal thick film. The manufacturing method provided by the invention is applicable to high-voltage electrothermal equipment, good in stability and using effect, and is not demoulded.
Owner:CIXI SOVONO ELECTRIC APPLIANCE

Novel nano-carbon-fiber heating floor and preparation method thereof

The invention provides a novel nano-carbon-fiber heating floor and a preparation method thereof. The preparation method comprises the following steps: (1) placing nano polyacrylonitrile fibers prepared by electrostatic spinning in a roasting oven, performing heat treatment by using air as a medium, and performing carbonization treatment under nitrogen environment so as to obtain carbonized nano polyacrylonitrile fibers; (2) stirring plant protoplasm fibers and a cationic surface active agent under a closed condition and normal temperature till a uniform mixture is obtained, adding the carbonized nano polyacrylonitrile fibers and nano graphite powder in the mixture, stirring the carbonized nano polyacrylonitrile fibers, the nano graphite powder and the mixture at a high speed, and preparing sheet type flexible macromolecule materials by a hot-pressing technology; (3) fixing metal-sheet electrodes at both ends of the sheet type flexible macromolecule materials by a silver solution so as to form a conductive heating layer; and (4) shearing a solid-wood layer, an insulation layer, the conductive heating layer, a temperature control layer, another solid-wood layer and a surface treatment layer with appropriate sizes from bottom to top, and performing combination so as to form the nano-carbon-fiber heating floor.
Owner:浙江康辉木业有限公司

Motor rotor winding method

The invention discloses a motor rotor winding method, which comprises a rotor rotating shaft, an insulating sleeve and a coil, wherein the insulating sleeve and the coil sleeve the rotor rotating shaft; the insulating sleeve is sequentially sleeved with a commutator and a winding skeleton; a magnetic pole group is arranged on the outer side surface of the winding skeleton; eight line through grooves are sequentially arranged on the winding skeleton along the circumference; the line through grooves are sequentially numbered N1, N2, N3, N4, N5, N6, N7 and N8 along the circumference; the commutator is sequentially provided with eight brass hooks along the circumference; the brass hooks are sequentially numbered P1, P2, P3, P4, P5, P6, P7 and P8 along the circumference; an included angles between the central line of an armature stack and the central line of the corresponding commutator is 4.5-8.5 degrees; the central line of the commutator is close to a left pole end of a rotor. By double groove-crossing, double groove-crossing is required for each winding of each hook, so that the resistance of a motor rotor winding is evenly distributed; the stalling torque deviation of the motor is relatively small; the energy loss of the motor is reduced; and the service lifetime of the motor is prolonged.
Owner:HAIAN LIANKE AUTOMOBILE PARTS

Conductive rubber roller and imaging device

The invention provides a conductive rubber roller which comprises a metal shaft core and a rubber layer wrapped on the metal shaft core, wherein the rubber layer comprises a low-hardness base layer formed by polar rubber materials and a high-hardness covering layer formed by nonpolar rubber materials formed on the outside surface of the low-hardness base layer; a softener is filled in the low-hardness base layer; and the solubility parameter Delta A of the softener filled in the low-hardness base layer, the solubility parameter Delta B of rubber components of the high-hardness covering layer, and the solubility parameter Delta C of rubber components of the low-hardness base layer have the following relational expression: (Delta A- Delta B) is greater than or equal to 2.8 (J/cm<3>)<1/2>; and | Delta A- Delta C | is less than or equal to 1.5 (J/cm<3>)<1/2>. According to the invention, the migration of the softener from the low-hardness base layer to the high-hardness covering layer is effectively prevented, and the pollution to photosensitive members is avoided in the process of using the conductive rubber roller, and therefore, both the hardness requirement of the whole rubber layer is ensured, and the conductive rubber roller has softness, the resistance fluctuation caused by environment and time changes is small, and the resistance is distributed uniformly. The invention also provides an imaging device with the conductive rubber roller.
Owner:SHENZHEN LEPUTAI TECH CO LTD

Method for preparing n-type crystalline silica double-side solar cell

The invention discloses a method for preparing n-type crystalline silica double-side solar cell, and the method comprises the steps of texturing a silicon chip surface and cleaning; depositing a silicon oxide film where boron is heavily doped on the side that demands boron diffusion through CVD method or PVD method, and the thickness is 20-200nm; depositing an oxide film where phosphor is heavily doped on the side that demands phosphor diffusion through the CVD method or PVD method, and the thickness is 20-200nm; performing high temperature diffusion at a normal pressure in clean air atmosphere or oxygen atmosphere to obtain a doped n-type layer and a doped p-type layer at the same time; removing and cleaning by a wet chemical method of a silicon chip double-side oxide; depositing a silicon chip double-side passivation antireflection coating; preparing a silicon chip double-side grid line electrode; and processing anti-creeping treatment to the silicon chip edge. The diffusion technology is relatively simple; the doped concentration of the doping layer is accurate and controllable; the dying problem of the surface due to over high density can be avoided; and the square resistance of the obtained doping layer is distributed evenly. The prepared n-type crystalline silica double-side solar cell has an excellent performance, and the manufacture cost is low.
Owner:NANCHANG UNIV

Step pulse confirmation method and device, electronic equipment and storage medium

The invention relates to a step pulse confirmation method. The method comprises the following steps: determining a current equation containing a first unknown parameter and a second unknown parameterbased on a determined resistance equation and a temperature equation; determining a first step pulse corresponding to the first resistance value according to the plurality of resistance values corresponding to the plurality of first step pulses; wherein the pulse width and the amplitude of the first pulse of the first step pulse corresponding to the resistance value of the first resistor are the first pulse width and the first amplitude; determining a second step pulse corresponding to the second resistance value according to the plurality of resistance values corresponding to the plurality ofsecond step pulses, wherein the pulse width of the non-first pulse of the second step pulse corresponding to the resistance value of the second resistor is the second pulse width; determining a current equation based on the second pulse width and the first amplitude; and adjusting the amplitude of the non-first pulse of the second step pulse corresponding to the second resistance value based on the current equation to obtain a target step pulse matched with the current equation. The target step pulse obtained by the design can improve the success rate of the erasing operation and increase thespeed.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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