3results about How to "Improve the wrapping effect" patented technology

The application relates to the technical field of pesticides, and particularly discloses a tetramethylpyrazine suspension agent with slow-release performance and a preparation method thereof. The tetramethylpyrazine is prepared into a suspension, so that the particle size of the tetramethylpyrazine can be controlled, and tetramethylpyrazine particles with a suitable particle size as a capsule core can be obtained without dissolving and emulsifying the tetramethylpyrazine technical material. The application overcomes the defect that the tetramethylpyrazine is difficult to adopt a traditional microcapsule coating process, and a capsule membrane formed by a melamine modified urea-formaldehyde resin prepolymer can hinder the degradation of the tetramethylpyrazine, thereby prolonging the persistence period of the tetramethylpyrazine suspension agent and improving the insecticidal effect of the tetramethylpyrazine pesticide.

This invention relates to the field of electronic paste preparation technology, and discloses a low sheet resistance tungsten-copper electronic paste and its preparation method, comprising the following steps: Step 1, preparing tungsten-copper composite powder: spherical tungsten powder with a diameter of 1-10 μm and copper powder with a size of 1-3 μm are mixed by mechanical mixing, with a tungsten to copper weight ratio of 3:1-6:1. Before mixing, the copper powder needs to undergo graphene coating pretreatment; Step 2, preparing an inorganic binder: the inorganic binder includes, but is not limited to, the following components: glass powder, CuO, TiO2, La2O3, Pu6O11; Step 3, preparing an organic carrier: the organic carrier includes a solvent, an organic binder, and a thickener; Step 4, preparing the tungsten-copper paste. The tungsten-copper paste of this invention has widely available raw materials, a simple preparation process, and is suitable for mass production. Although graphene, a high-priced material, is added, the amount added is small and the performance is particularly excellent, making the cost of the tungsten-copper paste of this invention far lower than that of similar foreign products, resulting in a very high cost-performance ratio.

This invention discloses a method for manufacturing a traveling wave pump rotor, comprising the following steps: machining the outer shell, machining the base plate and the first injection-molded plate, machining the cover plate and the second injection-molded plate, machining the enclosure mechanism, and machining and forming the rotor. The manufacturing method of this invention is simple in its steps, which not only improves the integral machining quality of the traveling wave pump rotor, but also facilitates the formation of an injection-molded layer on the surface of the traveling wave blades, reducing friction and wear of the traveling wave pump rotor during operation, while also reducing noise and extending the service life of the traveling wave pump.