4 results about "Colloidal silica" patented technology

A coating composition for forming a glossy, inkjet-receptive coating on a substrate includes (a) a cationic polymer, and (b) colloidal silica having an average particle size in the nanometer range.

The invention provides a method for producing a large-power LED lamp without a halo, which comprises the steps of: firstly, fixing a wafer, i.e. the wafer is fixed on a copper column which is arranged on a bracket by splicing with elargol; secondly, welding a wire, i.e. the anode and the cathode of the wafer are connected with two welding pans of a pin, so that the LED is formed into an electric loop; thirdly, pointing fluorescent powder, i.e. the wafer is coated with fluorescent gel which consists of the fluorescent powder and the colloidal silica, so that the fluorescent gel is covered on all wafer to achieve a good light emission effect; and fourthly, sealing outer sealing gel, i.e. a transparent outer sealed lens is internally injected with the sealing gel, the sealing gel is further added with a chemical industrial dispersing agent, and the other impure lights and colors are removed by the chemical industrial dispersing agent.

The invention relates to the technical field of glass fiber pipe production, in particular to an environment-friendly glass fiber sleeve gluing and coating device which comprises a shell, an extrusion pipe capable of sliding and displacing and a guide pipe containing and penetrating through a glass fiber pipe, the extrusion pipe is arranged on the peripheral side of the guide pipe in a sleeving mode, and a cavity for containing coating liquid is defined by the shell, the extrusion pipe and the guide pipe jointly. The guide pipe comprises an upper port and a lower port, a glass fiber pipe can enter the upper port through the upper port, the lower port is linearly communicated with the upper port, the lower port is coaxially connected with a nozzle assembly in a penetrating manner, the nozzle assembly comprises a pipeline and a spraying channel, the pipeline is communicated with the lower port, the spraying channel is communicated with the cavity, and the spraying channel surrounds the pipeline and is coaxially arranged. And when the glass fiber pipe is pulled out from the pipeline of the nozzle assembly, the silica gel coating liquid in the spraying channel is uniformly coated on the surface of the glass fiber pipe under the action of the gravity of the silica gel coating liquid.

The invention provides a convex double-layer pressure sensitive film based on an MEMS process. The film comprises a soft film and a medium hard film plated below the soft film, the diameter of the soft film is greater than that of the medium hard film; the soft film is a rubber film or a silica gel film made of PDMS, the medium hard film comprises a plurality of first medium layers and a pluralityof second medium layers, the refractive index of the first medium layers is larger than that of the second medium layers, and the first medium layers and the second medium layers are sequentially andalternately stacked from bottom to top. The invention further provides an FP cavity optical fiber acoustic sensor, when the FP cavity optical fiber acoustic sensor is used for collecting transmissionlight for demodulation, due to the fact that the reflectivity of the two cavity faces of the FP cavity is close to 99% through a thin film process, the transmission spectrum is a sharp comb-shaped spectral line, at the moment, the transmission light is received, and an acoustic pressure signal is obtained by demodulating an optical signal. The sensitive film manufactured by the method is large inperipheral deformation quantity, almost has no deformation in the diameter range of an optical fiber mode field, and is high in reflectivity.