2results about How to "Improve hardness performance" patented technology

This utility model discloses a high-strength composite structure drill bit, relating to the field of drill bit technology, comprising: a reinforcing rod; a cutting assembly disposed on the outer circumference of the reinforcing rod; a fixing assembly disposed on the outer circumference of the reinforcing rod and the cutting assembly for fixing the reinforcing rod and the cutting assembly; and a composite layer disposed on the surface of the cutting assembly for high-strength protection. This utility model, by setting auxiliary spiral grooves and gradually decreasing the spiral angle from the bottom to the top of the drill bit, optimizes the guidance and discharge path of waste chips according to the needs of different stages during drilling. This not only improves chip removal efficiency and reduces pressure backflow caused by waste chip blockage, but also enhances drilling speed and the stability of the drilling process.

The invention discloses a nano-zirconia dispersion liquid and a preparation method thereof, an optical coating liquid, an optical film and application thereof, and relates to the technical field of materials. The nano zirconium oxide dispersion liquid comprises modified nano zirconium oxide and a first organic solvent, and a modifier of the modified nano zirconium oxide comprises a coupling agent and polymer resin; wherein the polymer resin is poly (isobornyl acrylate-co-polyethylene glycol methacrylate). A flexible segment of polyethylene glycol methacrylate in the polymer resin provides better flexibility for the optical film, and a bridge ring structure of isobornyl acrylate forms a net structure with high crosslinking density in a film forming process and reduces internal stress in a photocuring process, so that better hardness performance is provided for the optical film; the nanoscale particle size zirconium oxide significantly improves the dispersion uniformity, reduces light scattering, improves the light transmittance and light transmission uniformity of the optical film, and reduces the haze of the film. And the method is expected to be popularized and applied in the frontier fields of high-precision optical systems, flexible display and the like.