11results about How to "Thin diameter" patented technology

The present invention proposes a nanofiber composite vehicle air filter paper with a gradient structure and a preparation method thereof, which is used to solve the technical problems of poor bonding strength between nanofibers and substrates and low filtration efficiency in nanofiber filter materials. The present invention uses a preparation process combining electrostatic spinning and electrostatic spraying to prepare a nanofiber composite vehicle air filter paper, which includes an ultrafine nanofiber mesh layer, a nanofiber layer and a filter paper layer arranged in sequence. The present invention has a good effect on PM under industrial standard wind speed conditions. 0.3 The initial filtration efficiency of particulate matter can reach 99.9%, reaching the H12 standard for air filtration materials. More importantly, in the self-cleaning backflush test, after 10,000 backflush tests, the PM 0.3 The filtration efficiency can still be maintained above 90%. This provides a new strategy for high-performance nanofiber filtration materials, which is of great significance to the high-tech, high-quality, green and sustainable development of nonwoven materials and filtration materials.

The invention relates to the technical field of multi-layer fabrics, and discloses a moisture-permeable layered composite fabric and a preparation method thereof. The preparation method comprises the following steps: compounding polyvinylidene fluoride, an antibacterial agent and a solvent, and performing electrostatic spinning to obtain an inner-layer fabric; mixing an epoxy resin / waterborne polyurethane composite material with a beta-cyclodextrin / polytetrahydrofuran ether glycol compound, and performing electrostatic spinning to obtain a middle layer / inner layer composite fabric; and compounding and hot-pressing the middle-layer / inner-layer composite fabric and the outer-layer fabric to obtain the moisture-permeable layered composite fabric. The layered composite fabric has excellent waterproof and moisture permeable properties and good mechanical properties and antibacterial properties.

The invention provides a production process of a special material for a random copolymerization soft fiber high-end sanitary material, and mainly solves the problems of thicker drawn wires, more burrs and poor softness of a homo-polypropylene material prepared by the existing gas phase method. The method is characterized by comprising the following steps: S1, prepolymerization reaction: prepolymerizing a catalyst and propylene to generate a prepolymerization product; s2, random copolymerization reaction: under the action of a catalyst, carrying out random copolymerization reaction on the generated prepolymerization product, gas-phase propylene and a small amount of ethylene to obtain polymer basic powder under polymerization process conditions; and S3, peroxide degradation reaction: blending the obtained polymer basic powder with an additive, degrading with an oxide degradation agent, and carrying out melt extrusion granulation to obtain a target product. According to the production process of the special material for the random copolymerization soft fiber high-end sanitary material, a special material non-woven fabric product is good in softness, the diameter of filaments is thinner and more uniform, and the hand feeling of the product is more excellent.

The invention provides a composite cable and a composite wire harness, the composite cable enables wires for transmitting control signals of a control object device to be redundant and the outer diameter of the cable to be reduced, and the composite wire harness is provided with the composite cable and a connector. A composite cable (1) is provided with: a plurality of power supply lines (10) that supply operation power to an electric brake unit (9); a first signal twisted wire (110) formed by twisting a plurality of first signal wires (11) for transmitting a control signal for controlling the electric brake unit; a second signal twisted wire (120) formed by twisting a plurality of second signal wires (12) for redundancy of the plurality of first signal wires; and a sheath (14) that covers the plurality of power supply lines, the plurality of first signal strands, and the plurality of second signal strands. The first signal stranded wire (110) and the second signal stranded wire are disposed apart from each other so as to sandwich the plurality of power supply wires. A composite wire harness (2) is provided with a composite cable (1), a wheel-side connector (21), and a vehicle-body-side connector (22).

The application discloses an opening and closing input device, a rotating input device, a master hand input device, a force feedback master hand and a surgical robot, and relates to the technical field of medical instruments.The technical scheme points of the application are that the opening and closing input device comprises a first motor, a screw block assembly, an opening and closing seat, a finger clamp and a connecting rod;the first motor is a frameless torque motor;the opening and closing seat is fixedly connected with the first motor;the end portion of the finger clamp, which is away from the first motor, is hingedly connected with the opening and closing seat;the portion of the finger clamp, which is close to the first motor, is hingedly connected with the corresponding connecting rod;the connecting rod is hingedly connected with the screw block assembly;the first motor drives all the connecting rods and the hinged portions of the screw block assembly to reciprocate along the first motor axis through the screw block assembly.The screw block assembly is directly connected with the frameless torque motor, the force transmission efficiency and the feedback resolution are improved, a foundation for providing accurate force feedback / force assistance is established, and the compact and small structure requirement of the opening and closing input device is met.

The utility model discloses a mining optical fiber composite flame-retardant flexible cable, relates to the technical field of mining cables, and solves the problems that a stainless steel sheath is directly arranged on the outer side of a cable body of some mining cables in order to protect the cables, so that the weight of the cables is increased, and the service life of the cables is prolonged. The stainless steel cable comprises a cable body and a protective layer which is arranged on the outer side of the cable body in a sleeving manner, and the protective layer is arranged on the outer side of the cable body in a sleeving manner. The outer side of the protective layer is sleeved with a threaded armored 4B sleeve, the outer side of the threaded armored 4B sleeve is sleeved with a connecting layer, the outer side of the connecting layer is provided with a filling layer, the outer side of the filling layer is provided with a reinforcing layer, the outer side of the reinforcing layer is sleeved with a heat insulation layer, and the outer side of the heat insulation layer is sleeved with an outer ring. According to the utility model, the wear resistance and tensile property of the cable body are realized through the outer ring when the cable body is used.

The invention discloses a preparation method and preparation and detection equipment of a high-efficiency low-resistance waterproof piezoelectric filter material, and the preparation method comprises the following steps: carrying out liquid-phase ultrasonic stripping on MoS2 to prepare a MoS2 dispersion liquid, mixing the MoS2 dispersion liquid, fluorinated SiO2 nanoparticles and a polyvinylidene fluoride solution, carrying out ultrasonic treatment and stirring to prepare a three-phase composite spinning solution, and carrying out ultrasonic treatment on the three-phase composite spinning solution to prepare the high-efficiency low-resistance waterproof piezoelectric filter material. Finally, spinning and polarization treatment are carried out through an electrostatic spinning mechanism, and the piezoelectric filter material is directly obtained. The preparation and detection equipment is composed of an electrostatic spinning mechanism, a material receiving mechanism, a conveying mechanism, a powder feeding mechanism and a detection mechanism, the electrostatic spinning mechanism and the material receiving mechanism are responsible for forming and functionalizing the piezoelectric filter material, the conveying mechanism conveys the piezoelectric filter material, the powder feeding mechanism provides dust, and the detection mechanism measures the filtering efficiency, resistance, hydrophobicity and piezoelectricity of the piezoelectric filter material on line. Through collaborative design of a material formula, integrated preparation and detection equipment, the production efficiency can be improved, the cost can be reduced, and the comprehensive performance of the piezoelectric filter material can be accurately evaluated in real time.

This application relates to the field of fiber optic towed sonar arrays, specifically disclosing a fiber optic towed linear array, comprising: a watertight optical cable, a transmission optical fiber, a multi-core optical fiber, multiple hydrophone probes, a sleeve, and a first watertight connector. The first watertight connector is installed in conjunction with the sleeve, and a watertight optical cable is disposed within the first watertight connector. The watertight optical cable branches into a transmission optical fiber and a multi-core optical fiber on the side near the sleeve. The transmission optical fiber is connected to the hydrophone probe, and the multi-core optical fiber is spirally wound around the outer periphery of the hydrophone probe and housed within the sleeve. The solution provided in this application overcomes the shortcomings of existing all-fiber towed linear arrays, which have many optical devices and can only measure attitude information at points, realizing distributed measurement of the towed array attitude and improving reliability.

The invention relates to superfine glass microfiber cotton and a preparation method thereof, and relates to the technical field of superfine glass microfiber cotton preparation, and the preparation method comprises the steps of raw material pretreatment, glass liquid preparation, glass filament preparation, glass microfiber cotton preparation and the like. And the finished product quality of the superfine glass microfiber cotton is improved. According to the method for producing the superfine glass microfiber cotton, the manual operation difficulty is low, the diameter of the prepared superfine glass microfiber cotton finished product is 0.8-1.5 microns, and the slag content is smaller than or equal to 0.4 wt%.

The invention discloses an organic nanowire for an electronic nose for pneumoconiosis detection and a detection method thereof, and the detection method comprises the following steps: representing the organic nanowire by SEM and XRD to judge whether the morphological characteristics of the organic nanowire are qualified, applying a load to an organic nanowire sample, and calculating the hardness value of the organic nanowire according to the load, preparing an indirectly-heated gas-sensitive element from the organic nanowires to test the sensitive characteristics of the indirectly-heated gas-sensitive element to different gases, and judging whether the gas-sensitive property and the mechanical property are qualified or not according to the hardness value and the sensitive characteristics; the diameter of the nanowire is smaller, the surface area is larger, the oxygen adsorption amount is increased, so that the gas-sensitive performance is improved, precious metal doping plays a good catalytic role, the activation energy of chemical adsorption of detected gas can be effectively reduced, the sensitivity of gas detection is improved, and the application prospect is wide. The detection method provided by the invention can realize accurate, effective and low-cost detection of the mechanical properties and gas-sensitive properties of the nanowire product, and ensures the quality of the nanowire for the electronic nose.

The invention relates to an image-transmitting optical fiber with a shape sensing function and a preparation method thereof, the optical fiber comprises an outer cladding and an image-transmitting surface layer, the outer cladding wraps the periphery of the image-transmitting surface layer, the image-transmitting surface layer comprises a common cladding and image-transmitting fiber cores tightly arranged in the common cladding at intervals, and the image-transmitting fiber cores are arranged in the common cladding at intervals. And a sensing fiber core with three or more cores is arranged in the image transmitting surface layer and close to the inner circumferential surface of the outer cladding. The sensing optical fiber and the image transmitting optical fiber are integrated, the diameter is small, the optical fiber can enter a small channel conveniently, and a small-size endoscope with a shape sensing function can be manufactured; the integrated image transmission sensing optical fiber can realize synchronous operation of the shape sensing module and the image transmission module, is excellent in bending performance and high in spatial resolution, can realize real-time image transmission and synchronous shape reconstruction, and has a three-dimensional shape sensing function and an image transmission function.