3results about How to "Avoid surface defects" patented technology

The invention discloses an environment-friendly high-performance titanium alloy polishing composition as well as a preparation method and application thereof, and relates to the technical field of metal material surface treatment. According to the environment-friendly high-performance titanium alloy polishing composition, the pH value of a basic system is adjusted to 9.5-10.0 through a pH adjusting agent; the base system comprises the following components in percentage by mass: 10-30% of silica sol, 3-4% of an anti-gel stabilizer (urea or methylurea), 2-3% of a heat transfer improvement and surface defect inhibitor (ethylene glycol or propylene glycol), 0.1-0.2% of a wetting leveling agent, 1-2% of an alcohol amine complexing agent and 0.5-1% of an aminopolycarboxylic acid chelating agent besides water. According to the environment-friendly high-performance titanium alloy polishing composition, on the premise that an oxidizing agent is completely abandoned, perfect balance of high stability, high polishing rate and excellent surface quality is achieved through unique formula design, and the environment-friendly high-performance titanium alloy polishing composition has the advantages of being environmentally friendly and high in safety.

The application provides a calendering method of aramid insulation paper, and relates to the field of high polymer chemistry and polymer processing, and comprises the following steps: step one, preheating aramid insulation paper; step two, feeding the substrate into a calendering machine, and performing calendering treatment at a set temperature, pressure and linear speed by using a multi-stage pressure control system; and step three, monitoring the thickness uniformity and surface quality of the aramid insulation paper in real time through an online detection system. The application has the following advantages: through the synergistic effect of multi-stage progressive pressure control, high-precision temperature regulation (±2 ℃) and optimized linear speed, and in combination with machine vision online detection and real-time feedback, the shortcomings of traditional calendering processes are effectively overcome, the surface smoothness, thickness uniformity and mechanical properties of the aramid insulation paper are significantly improved, the precision, efficiency and quality consistency of the production process are greatly improved, and the generation of surface defects such as stripes and corrugations is avoided.

The present application belongs to the field of batteries. The present application provides a kind of pole piece for improving surface flatness, its preparation method and battery, the preparation method includes that the coating layer of pole piece has formed is carried out re-coating, the mode of re-coating is gravure coating, control the particle size of substance in slurry used in re-coating is less than the particle size of substance in the coating layer that has formed, then carries out isostatic pressing treatment, forms re-coating layer.The specific re-coating layer formed by isostatic pressing treatment of the present application can prevent the generation of internal and surface defects of pole piece caused by roll pressing, improve the surface roughness and thickness uniformity of pole piece, effectively improve the surface flatness of pole piece and reduce interface impedance, optimize the solid-solid contact state and effect of electrode active material and solid electrolyte in pole piece, and further improve the cycle stability of battery.