6results about How to "Reduce surface residue" patented technology

The present invention belongs to the field of aluminum foil production and processing, and discloses a preparation method for producing semi-rigid antibacterial aluminum foil from a short-process cast-rolled billet, which sequentially undergoes the processes of smelting, casting and rolling, cold rolling, homogenization annealing, intermediate rolling, longitudinal shearing, finishing rolling, foil rolling, coiling, rolling products, slitting, and furnace annealing. Compared with existing aluminum alloy materials, it has excellent deep drawing performance, good deformation ability, high bursting strength, excellent antibacterial effect, high cleanliness, and short process. After forming, it has certain structural rigidity and is not easy to deform. At the same time, through innovative heat treatment control technology, it effectively reduces the thickness of the oxide film on the surface of the cast-rolled billet aluminum and the surface residues, and can better disperse and precipitate the antibacterial second phase in the aluminum alloy matrix. It has the advantages of good antibacterial, clean surface, and controllable wetting angle. It meets the technical requirements of semi-rigid, high cleanliness, and antibacterial aluminum foil. It has important practical value in the production of food packaging industry.

The application discloses a preparation and use method of a NbTi superconducting wire low-temperature inlay welding flux, and relates to the technical field of superconducting wires, and comprises the following steps: heating deionized water to 50-60 DEG C; respectively water-bath heating short-chain alkyl glycoside and polyethylene glycol in the water at 50-60 DEG C for 30-60 seconds; stirring the obtained hot deionized water under the condition of 100-150 r / min, and adding the obtained short-chain alkyl glycoside and polyethylene glycol; and adding xanthan gum and sodium benzoate into the obtained solution in sequence to obtain the flux. The application uses short-chain alkyl glycoside as the main component of the flux; the addition of a thickening agent realizes the physical covering of the copper material surface and prevents the secondary oxidation of the copper material, so that the completely environment-friendly flux meeting the enterprise sewage discharge standard is suitable for the low-temperature inlay welding WIC conventional product with the largest base number, and the obtained WIC product has very low surface residue.

A composite dielectric structure of a gallium nitride electronic device includes: a low interface state dielectric insertion layer and a high breakdown electric field dielectric layer, wherein the low interface state dielectric insertion layer is grown on the surface of the gallium nitride electronic device, and the high breakdown electric field dielectric layer is grown on the low interface state dielectric insertion layer. The present disclosure also provides a method for preparing a composite dielectric structure, including: placing the gallium nitride electronic device in a machine, adjusting the temperature of the machine to a first preset temperature, adjusting the power to a first preset power, using plasma to clean the surface of the gallium nitride electronic device, adjusting the temperature of the machine to a second preset temperature, adjusting the power to a second preset power, growing a low interface state dielectric insertion layer on the surface of the gallium nitride electronic device, adjusting the temperature of the machine to a third preset temperature, adjusting the power to a third preset power, and growing a high breakdown electric field dielectric layer on the low interface state dielectric insertion layer. The present disclosure can effectively solve the problem of surface interface defects of gallium nitride electronic devices.

The utility model relates to the technical field of strip steel rolling, in particular to a cold-rolled strip steel surface cleaning system. Comprising a strip steel heating device, a pre-cleaning device, a first drying device, a degreasing cleaning device and a second drying device which are sequentially arranged in the running direction of strip steel, and the strip steel heating device is arranged at the discharging end of the continuous mill and provided with a heating cavity used for heating the strip steel. The strip steel heating device is arranged to heat the strip steel, physical properties of oil sludge attached to the surface of the strip steel are changed, viscosity is reduced, activity is improved, the oil sludge on the surface of the strip steel is in an easy-to-clean state, energy media such as water, electricity and a cleaning agent in the cleaning process can be effectively saved, and the service life of the strip steel is prolonged. The strip steel surface is cleaned twice to remove strip steel surface residues, the efficiency of removing the strip steel surface residues is high, the cleaning effect is good, the strip steel surface smoothness can be remarkably improved, and the strip steel surface residues are reduced.

This utility model relates to the field of hygiene product technology, specifically to an adult diaper absorbent core that improves absorption speed. It includes an upper absorbent core layer, a middle absorbent core layer, and a lower absorbent core layer. The upper and lower absorbent core layers are fixedly connected to the upper and lower sides of the middle absorbent core layer, respectively. High-speed absorption grooves are provided at both the front and rear ends of the top of the upper absorbent core layer. A crotch ventilation groove is provided at the top of the upper absorbent core layer, located between the two sets of high-speed absorption grooves. A bottom layer is fixedly connected to the bottom of the lower absorbent core layer. The upper, middle, and lower absorbent core layers are all made of a mixture of wood pulp fiber and multiple sets of polymer particles. The upper and middle absorbent core layers each have a high-absorption zone and a low-absorption zone inside. This utility model, through a gender-differentiated zoned absorption design, significantly improves wearing comfort and reduces product costs while ensuring superior absorbency.

The invention belongs to the field of materials, and particularly relates to a preparation method of a low-odor spraying-free reinforced polypropylene composite material, which comprises the following steps: (1) premixing: adding polypropylene, polytetrafluoroethylene and a catalytic adsorbent into a mixer for dry mixing, and screening out the catalytic adsorbent to obtain a first premix; adding an auxiliary agent and a catalytic adsorbent into the mixer for dry mixing, and sieving the catalytic adsorbent to obtain a second premix; adding the anti-rust pigment into the first premix, mixing, adding the second premix, and continuously mixing to obtain a mixed material; (2) granulating: adding the mixed material and a catalytic adsorbent into an extruder, melting, filtering, extruding and granulating to obtain spray-free reinforced polypropylene composite material particles; and (3) degassing: spraying an extracting agent on the surfaces of the particles, then placing the particles on a deodorizing filter plate for standing, and finally drying the particles to obtain the low-odor spraying-free reinforced polypropylene composite material. The odor is reduced by adopting a multi-time odor removal mode.