9results about How to "Reduce penetration rate" patented technology

This invention discloses a tooling mold for manufacturing brake discs and a method for manufacturing brake discs. The tooling mold includes an insertion section whose shape matches the shape of the heat dissipation holes and achieves an interference fit after insertion. The end of the insertion section is fixedly connected to a sliding groove via a connecting rod. A sliding plate, which cooperates with the sliding groove, enables position adjustment of the insertion section. This invention offers flexible overall adjustment and can be used for combined adjustment of the spacing for brake discs of different sizes, facilitating operator operation. The method of manufacturing brake discs using this invention reduces the difficulty of drilling holes in carbon-carbon composite brake disc preforms, reducing processing volume; it reduces the time and material consumption required for brake disc vapor deposition; it improves the smoothness of the inner surface of the heat dissipation holes, reducing processing volume and avoiding dynamic imbalance and airflow velocity uniformity issues caused by rough holes; it promotes uniform product material, ensures uniform expansion coefficient, and reduces the probability of product cracking.

The application discloses an ultrafiltration membrane for sewage treatment and a preparation method thereof, and relates to the field of membrane separation technology. The method comprises the following steps: firstly, ZnO@PHEMA-Ag nanoparticles are prepared, and the nanoparticles are pretreated, modified, grafted and loaded with silver nanoclusters; then, maleic anhydride grafted PVDF and modified MXene are prepared; then, a composite casting solution is prepared, and the solution is cast into a film and then immersed into a polyvinyl alcohol coagulation bath containing dimethylformamide to form a film; finally, the finished ultrafiltration membrane is obtained through ultraviolet crosslinking post-processing. The ultrafiltration membrane has excellent anti-pollution performance through functional nanoparticles, substrate modification and process optimization.

The application relates to the technical field of steel wires, and discloses a corrosion-resistant galvanized steel wire and a preparation method thereof. The corrosion-resistant galvanized steel wire is obtained by galvanizing a steel wire body through plating aid, and the steel wire body is composed of the following components in percentage by weight: C 0.15%-0.20%, Mn 0.28%-0.45%, Mo 0.15%-0.20%, Cu 0.12%-0.25%, W 0.05%-0.10%, Al 0.08%-0.12%, Ti 0.004%-0.016%, Sn 0.004%-0.015%, B 0.005%-0.01%, Y 0.005%-0.008%, S<=0.005%, P<=0.005%, and the balance is iron and inevitable impurities. Through the technical scheme, the problem that the tensile strength of the steel wire body in the galvanized steel wire needs to be improved in the related art is solved.

The invention provides a preparation process of an oleophylic adhesion-resistant film layer of a perfume glass bottle. The preparation process sequentially comprises the steps of ultrasonic cleaning, surface activation, polymer solution spin coating and low-temperature cross-linking curing. The method comprises the following steps: firstly, sequentially adding a water-based decontamination solution, ethanol and deionized water into a glass bottle, and treating in an ultrasonic field of 30-45kHz, so that pollutants on the surface of the inner wall are separated; according to the invention, the low-temperature cross-linked solvent-resistant polymer film layer is formed on the inner wall of the glass, so that the film layer constructs a compact extraction-resistant network structure at 60-90 DEG C, and the permeation rate of ethanol and essential oil to the film layer can be reduced, so that the thickness stability of the film layer is kept for a long time in a closed and high-volatility perfume system; the anti-fingerprint film does not have swelling, softening or demolding phenomena, and is soaked in 85% ethanol and limonene essential oil for 72 hours, the thickness change rate of the film can be controlled below 5%, and the problem that a traditional anti-fingerprint film is easy to lose efficacy in a perfume bottle environment is effectively solved.

This invention relates to the field of corrosion-resistant special cables, specifically to a solvent-resistant and corrosion-resistant cable and its manufacturing method, comprising a conductor unit, an insulation protection unit, a shielding unit, a barrier protection unit, and an outer sheath unit arranged sequentially. The conductor unit is made of oxygen-free copper wire stranded together, with gaps filled with fluoroether-based corrosion-resistant sealant and cured at high temperature. The insulation protection unit is a three-layer co-extruded structure of modified cross-linked polyethylene with added nano-montmorillonite. The shielding unit is a double-layer reverse braided tin-plated copper wire with a polyurethane corrosion-resistant passivation coating on the surface. The barrier protection unit is a double-layer overlapping wrapping of aluminum-plastic composite tape and water-blocking and corrosion-resistant composite tape. This invention significantly improves the service stability and service life of the cable in complex corrosive environments, eliminates the need for additional corrosion-resistant outer sheath structures, reduces engineering application costs, and is suitable for power transmission needs in various scenarios such as chemical, marine, and new energy industries, possessing high application value.

The invention relates to the technical field of films, and discloses an antibacterial PE film and a preparation method thereof. The PE film prepared by the invention comprises the following raw materials in parts by weight: 35-45 parts of low-density polyethylene, 15-25 parts of high-density polyethylene, 10-20 parts of metallocene linear low-density polyethylene, 5-10 parts of maleic anhydride grafted POE, 5-10 parts of a composite antibacterial agent, 2-5 parts of a lubricant and 1-3 parts of an antioxidant. The PE film not only has the barrier property of the traditional PE film, but also is endowed with excellent antibacterial property by adding the composite antibacterial agent.

This application belongs to the field of packaging film technology, specifically providing a modified PE film and its preparation method. A modified PE film comprises the following components: a PE film, a modified polyvinyl alcohol coating solution, and zinc stearate; the modified polyvinyl alcohol coating solution is prepared by mixing polyvinyl alcohol, tannic acid, and nano-hydroxyapatite. The modified PE film obtained by this application has good mechanical properties and barrier properties.

The invention relates to the technical field of rubber, and relates to a corrosion-resistant rubber composite material and a preparation method thereof. The corrosion-resistant rubber composite material comprises the following components in parts by weight: 100 parts of matrix rubber; 50-65 parts of regenerated microspheres with a core-shell structure; 20 to 30 parts of layered hydrotalcite; 1 to 3 parts of dicumyl peroxide; 0.5 to 2.5 parts of auxiliary cross-linking agent TAIC (triallyl isocyanurate); 3-8 parts of epoxidized soybean oil; 0.5 to 2 parts of stearic acid; and 1-2 parts of an anti-aging agent 445. According to the corrosion-resistant rubber composite material provided by the invention, the mechanical property of the composite material is improved, the corrosion resistance of the composite material is improved, and the problems that a traditional material is insufficient in tensile strength and elongation at break and is easy to damage in a severe corrosion environment are solved; and the utilization value of the waste tires is increased, the solid waste treatment mode is improved, secondary pollution is avoided, and low-cost green cyclic utilization is achieved.

This invention provides a PDA / ODT-ODTMS composite coating and its preparation method, relating to the field of metal surface protection technology. The coating comprises, from the inside out, a polydopamine intermediate layer and a co-deposited functional layer of n-octadecyl mercaptan / octadecyltrimethoxysilane. The preparation method involves first electrodepositing a PDA intermediate layer on the substrate surface, then immersing it in an aqueous micelle deposition solution composed of n-octadecyl mercaptan, octadecyltrimethoxysilane, and a surfactant, and forming the composite functional layer through isothermal chemical deposition. This invention, through molecular-level co-deposition of ODT and ODTMS combined with an aqueous micelle process, constructs a firmly adhered, dense, and highly hydrophobic protective barrier on the metal surface, significantly improving the long-term corrosion resistance and stability of the coating, while also making the preparation process safer and more environmentally friendly.